Click to call application

I have a big problem with a click to call web application. The application use AMI commands to initiate call.
I use Asterisk Now, updated to latest updates available.
The application work well when i try to initiate soft-phone to soft-phone calls, or soft-phone to cellular calls, but when i try to make cellular to cellular calls i don’t have sound transfer.
Anybody can help me? Any idea will be appreciated.

Thank’s guys