[Freeswitch-users] Not getting a ring back for local extensions on a specific device

Hello, I am using a SNOM 320 and Windows Mobile 6 VoIP softphone on two separate extensions. When dialing from the SNOM to the WM6 device I get ringback on the SNOM but when calling the SNOM from the WM6 device I don't get ringback though the call does complete and I get voice after the connection. Any ideas? Maxim.