Create extensions problem


In my old Asterisk system (without Freepbx) and without GUI. I have in only text extensions. So I create file and I have this extensions:
exten => 7,1,Dial(IAX2/Test)
exten => _7.,1,Dial(IAX2/Test/${EXTEN:1})

When I chose 7101 I connect to central ‘7’ and number 101, when I chose 7102 I connect to central ‘7’ and number 102 etc.
Now I use only AsteriskNOW with Freepbx. I create IAX2 device. When I put in console ‘iax2 show peers’ I have status OK (2ms) but I can’t connect to device 101 I central ‘7’
Please help me.