Extension in a ring group doesn't receive calls

Dear all,

I would like to post my problem which is the following:

in a FreePBX installation (FreePBX 2.11.0.10) I have a ring group (secretary) configured in my ivr for incoming calls which contains 3 extensions (755, 782, 756) and the ring strategy is set to “firstavailable”.

Despite the fact that I can call 782 directly, when someone calls the ring group and the 755 phone is talking or in DND, the 782 does not ring.
My installation was working without any problhems and I cannot understand why it is broken.

Here is my “Subscribe/Notify” report:
-= Registered Asterisk Dial Plan Hints =-
*21730@ext-findmefollow : Custom:FOLLOWME730 State:Idle Watchers 0
*740712@ext-cf-hints : Custom:DEVCF712 State:Idle Watchers 0
*76730@ext-dnd-hints : Custom:DEVDND730 State:Idle Watchers 0
*8570@park-hints : park:1@parkedcalls&p State:Idle Watchers 0
*21867@ext-findmefollow : Custom:FOLLOWME867 State:Idle Watchers 0
*740778@ext-cf-hints : Custom:DEVCF778 State:Idle Watchers 0
*740774@ext-cf-hints : Custom:DEVCF774 State:Idle Watchers 0
*740775@ext-cf-hints : Custom:DEVCF775 State:Idle Watchers 0
*740776@ext-cf-hints : Custom:DEVCF776 State:Idle Watchers 0
*740777@ext-cf-hints : Custom:DEVCF777 State:Idle Watchers 0
*740771@ext-cf-hints : Custom:DEVCF771 State:Idle Watchers 0
*740772@ext-cf-hints : Custom:DEVCF772 State:Idle Watchers 0
*21878@ext-findmefollow : Custom:FOLLOWME878 State:Idle Watchers 0
*21788@ext-findmefollow : Custom:FOLLOWME788 State:Idle Watchers 0
*21789@ext-findmefollow : Custom:FOLLOWME789 State:Idle Watchers 0
*21784@ext-findmefollow : Custom:FOLLOWME784 State:Idle Watchers 0
*21785@ext-findmefollow : Custom:FOLLOWME785 State:Idle Watchers 0
*21786@ext-findmefollow : Custom:FOLLOWME786 State:Idle Watchers 0
*21872@ext-findmefollow : Custom:FOLLOWME872 State:Idle Watchers 0
*21781@ext-findmefollow : Custom:FOLLOWME781 State:Idle Watchers 0
*21782@ext-findmefollow : Custom:FOLLOWME782 State:Idle Watchers 0
*21783@ext-findmefollow : Custom:FOLLOWME783 State:Idle Watchers 0
*76712@ext-dnd-hints : Custom:DEVDND712 State:Idle Watchers 0
*84793@ext-local : ccss:SIP/793 State:Idle Watchers 0
*84791@ext-local : ccss:SIP/791 State:Idle Watchers 0
*84796@ext-local : ccss:SIP/796 State:Idle Watchers 0
*84797@ext-local : ccss:SIP/797 State:Idle Watchers 0
*84794@ext-local : ccss:SIP/794 State:Idle Watchers 0
*84795@ext-local : ccss:SIP/795 State:Idle Watchers 0
*84798@ext-local : ccss:SIP/798 State:Idle Watchers 0
886@ext-local : SIP/886&Custom:DND88 State:Idle Watchers 0
*84799@ext-local : ccss:SIP/799 State:Idle Watchers 0
730@ext-local : SIP/730&Custom:DND73 State:Unavailable Watchers 0
883@ext-local : SIP/883&Custom:DND88 State:Idle Watchers 0
*740759@ext-cf-hints : Custom:DEVCF759 State:Idle Watchers 0
*740756@ext-cf-hints : Custom:DEVCF756 State:Idle Watchers 0
*740757@ext-cf-hints : Custom:DEVCF757 State:Idle Watchers 0
*740754@ext-cf-hints : Custom:DEVCF754 State:Idle Watchers 0
*740755@ext-cf-hints : Custom:DEVCF755 State:Idle Watchers 0
*740752@ext-cf-hints : Custom:DEVCF752 State:Idle Watchers 0
*740753@ext-cf-hints : Custom:DEVCF753 State:Idle Watchers 0
*740751@ext-cf-hints : Custom:DEVCF751 State:Idle Watchers 0
894@ext-local : SIP/894&Custom:DND89 State:Idle Watchers 0
896@ext-local : SIP/896&Custom:DND89 State:Idle Watchers 0
897@ext-local : SIP/897&Custom:DND89 State:Idle Watchers 0
764@ext-local : SIP/764&Custom:DND76 State:Idle Watchers 1
765@ext-local : SIP/765&Custom:DND76 State:Idle Watchers 1
891@ext-local : SIP/891&Custom:DND89 State:Idle Watchers 0
766@ext-local : SIP/766&Custom:DND76 State:Idle Watchers 1
767@ext-local : SIP/767&Custom:DND76 State:InUse Watchers 2
761@ext-local : SIP/761&Custom:DND76 State:Idle Watchers 1
762@ext-local : SIP/762&Custom:DND76 State:Idle Watchers 1
898@ext-local : SIP/898&Custom:DND89 State:Idle Watchers 0
899@ext-local : &Custom:DND899 State:Idle Watchers 0
*21857@ext-findmefollow : Custom:FOLLOWME857 State:Idle Watchers 0
768@ext-local : SIP/768&Custom:DND76 State:Idle Watchers 1
*740768@ext-cf-hints : Custom:DEVCF768 State:Idle Watchers 0
*21852@ext-findmefollow : Custom:FOLLOWME852 State:Idle Watchers 0
*740898@ext-cf-hints : Custom:DEVCF898 State:Idle Watchers 0
*740765@ext-cf-hints : Custom:DEVCF765 State:Idle Watchers 0
*740764@ext-cf-hints : Custom:DEVCF764 State:Idle Watchers 0
*740767@ext-cf-hints : Custom:DEVCF767 State:Idle Watchers 0
*740766@ext-cf-hints : Custom:DEVCF766 State:Idle Watchers 0
*740894@ext-cf-hints : Custom:DEVCF894 State:Idle Watchers 0
*740761@ext-cf-hints : Custom:DEVCF761 State:Idle Watchers 0
*740897@ext-cf-hints : Custom:DEVCF897 State:Idle Watchers 0
*740896@ext-cf-hints : Custom:DEVCF896 State:Idle Watchers 0
*740891@ext-cf-hints : Custom:DEVCF891 State:Idle Watchers 0
*740762@ext-cf-hints : Custom:DEVCF762 State:Idle Watchers 0
712@ext-local : SIP/712&Custom:DND71 State:Idle Watchers 0
*21799@ext-findmefollow : Custom:FOLLOWME799 State:Idle Watchers 0
*21798@ext-findmefollow : Custom:FOLLOWME798 State:Idle Watchers 0
*21795@ext-findmefollow : Custom:FOLLOWME795 State:Idle Watchers 0
*21794@ext-findmefollow : Custom:FOLLOWME794 State:Idle Watchers 0
*21797@ext-findmefollow : Custom:FOLLOWME797 State:Idle Watchers 0
*21796@ext-findmefollow : Custom:FOLLOWME796 State:Busy Watchers 0
*21791@ext-findmefollow : Custom:FOLLOWME791 State:Busy Watchers 0
4@park-hints : park:4@parkedcalls State:Idle Watchers 0
*21793@ext-findmefollow : Custom:FOLLOWME793 State:Idle Watchers 0
1@park-hints : park:1@parkedcalls State:Idle Watchers 0
*76857@ext-dnd-hints : Custom:DEVDND857 State:Idle Watchers 0
*740886@ext-cf-hints : Custom:DEVCF886 State:Idle Watchers 0
*84783@ext-local : ccss:SIP/783 State:Idle Watchers 0
3@park-hints : park:3@parkedcalls State:Idle Watchers 0
*84782@ext-local : ccss:SIP/782 State:Idle Watchers 0
2@park-hints : park:2@parkedcalls State:Idle Watchers 0
*84781@ext-local : ccss:SIP/781 State:Idle Watchers 0
*76852@ext-dnd-hints : Custom:DEVDND852 State:Idle Watchers 0
*740883@ext-cf-hints : Custom:DEVCF883 State:Idle Watchers 0
*84786@ext-local : ccss:SIP/786 State:Idle Watchers 0
*84785@ext-local : ccss:SIP/785 State:Idle Watchers 0
*84784@ext-local : ccss:SIP/784 State:Idle Watchers 0
*84789@ext-local : ccss:SIP/789 State:Idle Watchers 0
*84788@ext-local : ccss:SIP/788 State:Idle Watchers 0
775@ext-local : SIP/775&Custom:DND77 State:Idle Watchers 0
774@ext-local : SIP/774&Custom:DND77 State:Idle Watchers 1
777@ext-local : SIP/777&Custom:DND77 State:Idle Watchers 1
776@ext-local : SIP/776&Custom:DND77 State:Idle Watchers 1
771@ext-local : SIP/771&Custom:DND77 State:Idle Watchers 1
*84899@ext-local : ccss: State:Idle Watchers 0
*84898@ext-local : ccss:SIP/898 State:Idle Watchers 0
772@ext-local : SIP/772&Custom:DND77 State:Idle Watchers 2
*84894@ext-local : ccss:SIP/894 State:Idle Watchers 0
*84897@ext-local : ccss:SIP/897 State:Idle Watchers 0
*84896@ext-local : ccss:SIP/896 State:Idle Watchers 0
*84891@ext-local : ccss:SIP/891 State:Idle Watchers 0
778@ext-local : SIP/778&Custom:DND77 State:Idle Watchers 1
*76878@ext-dnd-hints : Custom:DEVDND878 State:Idle Watchers 0
*76872@ext-dnd-hints : Custom:DEVDND872 State:Idle Watchers 0
852@ext-local : SIP/852&Custom:DND85 State:Idle Watchers 0
*84886@ext-local : ccss:SIP/886 State:Idle Watchers 0
857@ext-local : SIP/857&Custom:DND85 State:Idle Watchers 0
*84883@ext-local : ccss:SIP/883 State:Idle Watchers 0
*21883@ext-findmefollow : Custom:FOLLOWME883 State:Idle Watchers 0
*21886@ext-findmefollow : Custom:FOLLOWME886 State:Idle Watchers 0
*740793@ext-cf-hints : Custom:DEVCF793 State:Idle Watchers 0
*84730@ext-local : ccss:SIP/730 State:Idle Watchers 0
*740791@ext-cf-hints : Custom:DEVCF791 State:Idle Watchers 0
*740796@ext-cf-hints : Custom:DEVCF796 State:Idle Watchers 0
*740797@ext-cf-hints : Custom:DEVCF797 State:Idle Watchers 0
757@ext-local : SIP/757&Custom:DND75 State:Idle Watchers 2
*740794@ext-cf-hints : Custom:DEVCF794 State:Busy Watchers 0
756@ext-local : SIP/756&Custom:DND75 State:Idle Watchers 0
*740795@ext-cf-hints : Custom:DEVCF795 State:Idle Watchers 0
755@ext-local : SIP/755&Custom:DND75 State:Idle Watchers 1
754@ext-local : SIP/754&Custom:DND75 State:Idle Watchers 1
753@ext-local : SIP/753&Custom:DND75 State:Idle Watchers 1
*740798@ext-cf-hints : Custom:DEVCF798 State:Idle Watchers 0
752@ext-local : SIP/752&Custom:DND75 State:InUse Watchers 1
*740799@ext-cf-hints : Custom:DEVCF799 State:Idle Watchers 0
751@ext-local : SIP/751&Custom:DND75 State:Idle Watchers 2
867@ext-local : SIP/867&Custom:DND86 State:Idle Watchers 0
759@ext-local : SIP/759&Custom:DND75 State:Idle Watchers 1
*21891@ext-findmefollow : Custom:FOLLOWME891 State:Idle Watchers 0
*21762@ext-findmefollow : Custom:FOLLOWME762 State:Idle Watchers 0
*21896@ext-findmefollow : Custom:FOLLOWME896 State:Idle Watchers 0
*21897@ext-findmefollow : Custom:FOLLOWME897 State:Idle Watchers 0
*21894@ext-findmefollow : Custom:FOLLOWME894 State:Idle Watchers 0
*21761@ext-findmefollow : Custom:FOLLOWME761 State:Idle Watchers 0
*21766@ext-findmefollow : Custom:FOLLOWME766 State:Idle Watchers 0
*21767@ext-findmefollow : Custom:FOLLOWME767 State:Idle Watchers 0
*21764@ext-findmefollow : Custom:FOLLOWME764 State:Idle Watchers 0
*21898@ext-findmefollow : Custom:FOLLOWME898 State:Idle Watchers 0
*21765@ext-findmefollow : Custom:FOLLOWME765 State:Idle Watchers 0
878@ext-local : SIP/878&Custom:DND87 State:Unavailable Watchers 0
*740852@ext-cf-hints : Custom:DEVCF852 State:Idle Watchers 0
*21768@ext-findmefollow : Custom:FOLLOWME768 State:Idle Watchers 0
788@ext-local : SIP/788&Custom:DND78 State:Idle Watchers 1
789@ext-local : SIP/789&Custom:DND78 State:Idle Watchers 1
*740857@ext-cf-hints : Custom:DEVCF857 State:Idle Watchers 0
872@ext-local : SIP/872&Custom:DND87 State:Idle Watchers 0
782@ext-local : SIP/782&Custom:DND78 State:Idle Watchers 1
783@ext-local : SIP/783&Custom:DND78 State:InUse Watchers 2
781@ext-local : SIP/781&Custom:DND78 State:Unavailable Watchers 1
786@ext-local : SIP/786&Custom:DND78 State:InUse Watchers 2
784@ext-local : SIP/784&Custom:DND78 State:Idle Watchers 0
785@ext-local : SIP/785&Custom:DND78 State:Idle Watchers 0
*76867@ext-dnd-hints : Custom:DEVDND867 State:Idle Watchers 0
*76799@ext-dnd-hints : Custom:DEVDND799 State:Idle Watchers 0
*76798@ext-dnd-hints : Custom:DEVDND798 State:Idle Watchers 0
*76797@ext-dnd-hints : Custom:DEVDND797 State:Idle Watchers 0
*21751@ext-findmefollow : Custom:FOLLOWME751 State:Idle Watchers 0
*76796@ext-dnd-hints : Custom:DEVDND796 State:Idle Watchers 0
*76795@ext-dnd-hints : Custom:DEVDND795 State:Idle Watchers 0
*21753@ext-findmefollow : Custom:FOLLOWME753 State:Idle Watchers 0
*76794@ext-dnd-hints : Custom:DEVDND794 State:Idle Watchers 0
*21752@ext-findmefollow : Custom:FOLLOWME752 State:Idle Watchers 0
*76793@ext-dnd-hints : Custom:DEVDND793 State:Idle Watchers 0
*21755@ext-findmefollow : Custom:FOLLOWME755 State:Idle Watchers 0
*21754@ext-findmefollow : Custom:FOLLOWME754 State:Idle Watchers 0
*84712@ext-local : ccss:SIP/712 State:Idle Watchers 0
*76891@ext-dnd-hints : Custom:DEVDND891 State:Idle Watchers 0
*76791@ext-dnd-hints : Custom:DEVDND791 State:Idle Watchers 0
*21757@ext-findmefollow : Custom:FOLLOWME757 State:Idle Watchers 0
*21756@ext-findmefollow : Custom:FOLLOWME756 State:Idle Watchers 0
*21759@ext-findmefollow : Custom:FOLLOWME759 State:Idle Watchers 0
*76894@ext-dnd-hints : Custom:DEVDND894 State:Idle Watchers 0
*76896@ext-dnd-hints : Custom:DEVDND896 State:Idle Watchers 0
*76897@ext-dnd-hints : Custom:DEVDND897 State:Idle Watchers 0
*76898@ext-dnd-hints : Custom:DEVDND898 State:Idle Watchers 0
*76788@ext-dnd-hints : Custom:DEVDND788 State:Idle Watchers 0
*76789@ext-dnd-hints : Custom:DEVDND789 State:Idle Watchers 0
*76786@ext-dnd-hints : Custom:DEVDND786 State:Idle Watchers 0
*76784@ext-dnd-hints : Custom:DEVDND784 State:Idle Watchers 0
*76785@ext-dnd-hints : Custom:DEVDND785 State:Idle Watchers 0
*740783@ext-cf-hints : Custom:DEVCF783 State:Idle Watchers 0
*76782@ext-dnd-hints : Custom:DEVDND782 State:Idle Watchers 0
*740782@ext-cf-hints : Custom:DEVCF782 State:Idle Watchers 0
*76783@ext-dnd-hints : Custom:DEVDND783 State:Idle Watchers 0
*740781@ext-cf-hints : Custom:DEVCF781 State:Idle Watchers 0
*76781@ext-dnd-hints : Custom:DEVDND781 State:Idle Watchers 0
*740872@ext-cf-hints : Custom:DEVCF872 State:Idle Watchers 0
*740786@ext-cf-hints : Custom:DEVCF786 State:Idle Watchers 0
*740785@ext-cf-hints : Custom:DEVCF785 State:Idle Watchers 0
*740784@ext-cf-hints : Custom:DEVCF784 State:Idle Watchers 0
*740789@ext-cf-hints : Custom:DEVCF789 State:Idle Watchers 0
*740788@ext-cf-hints : Custom:DEVCF788 State:Idle Watchers 0
*740878@ext-cf-hints : Custom:DEVCF878 State:Idle Watchers 0
*84852@ext-local : ccss:SIP/852 State:Idle Watchers 0
*280@app-daynight-toggle : Custom:DAYNIGHT0 State:Idle Watchers 1
*21772@ext-findmefollow : Custom:FOLLOWME772 State:Idle Watchers 0
*84857@ext-local : ccss:SIP/857 State:Idle Watchers 0
*84778@ext-local : ccss:SIP/778 State:Idle Watchers 0
*21771@ext-findmefollow : Custom:FOLLOWME771 State:Idle Watchers 0
*21777@ext-findmefollow : Custom:FOLLOWME777 State:Idle Watchers 0
*21776@ext-findmefollow : Custom:FOLLOWME776 State:Idle Watchers 0
*84774@ext-local : ccss:SIP/774 State:Idle Watchers 0
*21775@ext-findmefollow : Custom:FOLLOWME775 State:Idle Watchers 0
*84775@ext-local : ccss:SIP/775 State:Idle Watchers 0
*21774@ext-findmefollow : Custom:FOLLOWME774 State:Idle Watchers 0
*84776@ext-local : ccss:SIP/776 State:Idle Watchers 0
*84777@ext-local : ccss:SIP/777 State:Idle Watchers 0
799@ext-local : SIP/799&Custom:DND79 State:InUse Watchers 2
*84771@ext-local : ccss:SIP/771 State:Idle Watchers 0
*21778@ext-findmefollow : Custom:FOLLOWME778 State:Busy Watchers 0
*740867@ext-cf-hints : Custom:DEVCF867 State:Idle Watchers 0
798@ext-local : SIP/798&Custom:DND79 State:Idle Watchers 2
*84772@ext-local : ccss:SIP/772 State:Idle Watchers 0
793@ext-local : SIP/793&Custom:DND79 State:Idle Watchers 2
791@ext-local : SIP/791&Custom:DND79 State:Idle Watchers 1
797@ext-local : SIP/797&Custom:DND79 State:Idle Watchers 2
796@ext-local : SIP/796&Custom:DND79 State:Idle Watchers 1
795@ext-local : SIP/795&Custom:DND79 State:Idle Watchers 1
794@ext-local : SIP/794&Custom:DND79 State:Idle Watchers 1
*76883@ext-dnd-hints : Custom:DEVDND883 State:Idle Watchers 0
*76771@ext-dnd-hints : Custom:DEVDND771 State:Idle Watchers 0
*76886@ext-dnd-hints : Custom:DEVDND886 State:Idle Watchers 0
*76772@ext-dnd-hints : Custom:DEVDND772 State:Idle Watchers 0
*76775@ext-dnd-hints : Custom:DEVDND775 State:Idle Watchers 0
*76774@ext-dnd-hints : Custom:DEVDND774 State:Idle Watchers 0
*76777@ext-dnd-hints : Custom:DEVDND777 State:Idle Watchers 0
*76776@ext-dnd-hints : Custom:DEVDND776 State:Idle Watchers 0
*76778@ext-dnd-hints : Custom:DEVDND778 State:Idle Watchers 0
*84872@ext-local : ccss:SIP/872 State:Idle Watchers 0
*84759@ext-local : ccss:SIP/759 State:Idle Watchers 0
*84756@ext-local : ccss:SIP/756 State:Idle Watchers 0
*84878@ext-local : ccss:SIP/878 State:Idle Watchers 0
*84757@ext-local : ccss:SIP/757 State:Idle Watchers 0
*21712@ext-findmefollow : Custom:FOLLOWME712 State:Idle Watchers 0
*84754@ext-local : ccss:SIP/754 State:Idle Watchers 0
*84755@ext-local : ccss:SIP/755 State:Idle Watchers 0
*84752@ext-local : ccss:SIP/752 State:Idle Watchers 0
*84753@ext-local : ccss:SIP/753 State:Idle Watchers 0
*740730@ext-cf-hints : Custom:DEVCF730 State:Idle Watchers 0
*76761@ext-dnd-hints : Custom:DEVDND761 State:Idle Watchers 0
*84751@ext-local : ccss:SIP/751 State:Idle Watchers 0
*76762@ext-dnd-hints : Custom:DEVDND762 State:Idle Watchers 0
*76764@ext-dnd-hints : Custom:DEVDND764 State:Idle Watchers 0
*76765@ext-dnd-hints : Custom:DEVDND765 State:Idle Watchers 0
*76766@ext-dnd-hints : Custom:DEVDND766 State:Idle Watchers 0
*76767@ext-dnd-hints : Custom:DEVDND767 State:Idle Watchers 0
*76768@ext-dnd-hints : Custom:DEVDND768 State:Idle Watchers 0
*84867@ext-local : ccss:SIP/867 State:Idle Watchers 0
*84768@ext-local : ccss:SIP/768 State:Idle Watchers 0
*84765@ext-local : ccss:SIP/765 State:Idle Watchers 0
*85@park-hints : park:1@parkedcalls&p State:Idle Watchers 0
*84764@ext-local : ccss:SIP/764 State:Idle Watchers 0
*84767@ext-local : ccss:SIP/767 State:Idle Watchers 0
*84766@ext-local : ccss:SIP/766 State:Idle Watchers 0
*84761@ext-local : ccss:SIP/761 State:Idle Watchers 0
*76753@ext-dnd-hints : Custom:DEVDND753 State:Idle Watchers 0
*76752@ext-dnd-hints : Custom:DEVDND752 State:Idle Watchers 0
*84762@ext-local : ccss:SIP/762 State:Idle Watchers 0
*76751@ext-dnd-hints : Custom:DEVDND751 State:Idle Watchers 0
*76757@ext-dnd-hints : Custom:DEVDND757 State:Idle Watchers 0
*76756@ext-dnd-hints : Custom:DEVDND756 State:Idle Watchers 0
*76755@ext-dnd-hints : Custom:DEVDND755 State:Idle Watchers 0
*76754@ext-dnd-hints : Custom:DEVDND754 State:Idle Watchers 0
*76759@ext-dnd-hints : Custom:DEVDND759 State:Idle Watchers 0

Any thoughts?