Spychan haning up outgoing calls

Hi,
When I call 555, all the outgoing calls are hanging up, the incoming calls are fine and I can listen to them.

I’m using FPX in a Flash 1.7.5.5 (Purple)
Asterisk 1.8.3.2
FreePBX 2.8.1.4
CentOS 5.5 64 bit

What can I do?
Thanks!