Skype Connect

Hello,
I am having a problem a problem regarding Skype registration on FreePBX. The registration is fine on manager.skype.com but not on FreePBX. The string is as follows:
9905100027XXXX:[email protected]/9905100027XXXX

And this is what i get from the logs:
[2015-10-05 08:41:32] NOTICE[1730] chan_sip.c: – Registration for ‘[email protected]’ timed out, trying again (Attempt #9)
[2015-10-05 08:41:52] NOTICE[1730] chan_sip.c: – Registration for ‘[email protected]’ timed out, trying again (Attempt #10)
[2015-10-05 08:42:12] NOTICE[1730] chan_sip.c: – Registration for ‘[email protected]’ timed out, trying again (Attempt #11)
[2015-10-05 08:42:32] NOTICE[1730] chan_sip.c: – Registration for ‘[email protected]’ timed out, trying again (Attempt #12)

Please assist. Thanks in advance.