[Serusers] SER config

Hello everybody, I'm new to SER and try to write my first config file. After reading the Admin guide & the getting started Tutorial on onsip I still cannot configure my SER. In the test setup I have two systems -- 1. The Linux server ( where the SER is running) 2. one win XP system ( SIP UA). The linux server has two LAN cards one with a private IP and one with a public one. The SIP - Client has an account at a VoIP - Provider (sipgate). What I want the SER to do is to forward the call to the provider and to accept incoming calls. No authorisation or mysql things nedeed. I put in the cfg - file that SER should listen on both(public & private) interfaces. Until now SER forwards the call but he doesn't change the private IP - Address to the public one. Any ideas how I could solve the problem? Thanks in advance and excuse my bad english :-) ______________________________________________________________ Verschicken Sie romantische, coole und witzige Bilder per SMS! Jetzt bei WEB.DE FreeMail: http://f.web.de/?mc=021193