W2K3 Server RAS VPN Problem

Hi !

I´m trying to setup a Windows 2003 Server with RAS Services ...

The 2003 Server is a member of a NT4-Domain (No ADS here)
and i can logon / logoff using Domain logins just fine.

Now i tried to configure VPN but i just can´t get it to work.

The server authenthicates against a RADIUS Server, the
RADIUS server gets all the data, does the authorization and
sends a ok back to the 2003-Server.

But on the client i get:
Error 778 - Unable to verify server identity
(Text may differ, this is translated )

I don´t know why it´s working, i even tried to disable all
security features but it still refuses to connect to the
server.

Regards,
Daniel