VPN connection from WM6 to XP Prof

[Guest joschi76]

Hi everybody,

after googling through a lot of forums for some weeks now, I learnd a lot about VPN with WM6, setting up a VPN Server and all of this stuff.

But nowhere was a hint for my special problem...

I have an XP-Prof Server in my network, wich is set up as a VPN Server . It is behind my AVM Fritzbox 7270 where all the port-forwardings vor PPTP (GRE and port 1723) are done.

When I connect from the "outer world" using an XP or Vista machine, everything works fine.

But: When I connect from my Handheld (Samsung B7610), the connection is dropped after round about a minute.

Within this minute, I can start a Remote-Desktop-Session etc and everything seems to be alright until the connection gets lost.

There is no other connection been started (except my normal internet connection through "web.vodafone.de") , and Active Sync is set to "manuel", so it can't disturb my VPN session.

Is there anyone with an idea what I can do to get my VPN working???

Thanks in advance,

Joschi