pocketPC 2002 and RAS on a 2003 SBS server

Hi

I posted this question in microsoft.public.pocketpc without success

I have a iPaq 3850 running PPC 2002 trying to connect to a 2003 SBS without
success, it does dial out, connect, start authenticating and right away it
does disconnect.
This does not happen with an iPaq 2215 running PPC 2003
The same device worked flawless when connecting to a win2K server


Has anybody see this problem and more important have a solution for it?

Except the obvious one of upgrade to pocketPC 2003

Cheers,
Ignacio