Queues Problem

Hello,

I have fresh installed FreePBX from ISO, everything is working fine, except when I insert extensions in queue like

7720,0
7721,0

It doesnt take calls to those two extensions forwarding number as each extension has a forwarding phone number which would dial EXTERNAL phone number so the calls are not going out , outbound trunk is working fine without a problem so there is something up with the queue I am not sure if I have to do something special to make that work, please help.