This is not my problem.
 
I have conected the asterisk to FS and i can call from FS to Asterisk without problem.
I do some tests to call a international number using a sip provider that is registered on the asterisk pbx and work.
 
Actualy i can: call from any FS extension any Asterisk extension
                     call from any asterisk extension any fs extension
 
I tried to disable the asterisk gateway configuration but not resolve the issue.
 
Maybe the problem is with the other gateway.
 
I have to investigate :)
 
Sorry for my very bad english :)
 
Regards