windows vpn client disconnects

I have a computer which connects to my network using windows vpn client. my
network is running RRAS on windows server 2003.
the connection is good until about two minutes when it mysteriously
disconnects.
I dont think is a problem with the server because other clients are
connected for exteneded periods of time.
tried on the client:
disabled windows firewall.
disabled norton 2007 AV
disabled some anti-spyware program.

need help to figure out what else might be causing this.
--
ulyses96

It may be MTU issue. This troubleshooting may help. Please post back with
the result.

VPN connection is disconnected after several minutesVPN drops the
connection. VPN is very slow. To change the MTU Settings, ... Resolution:
Set my VPN client MTU to 1400. To modify MTU, please refer to this ...
www.chicagotech.net/VPN/vpn3minutes.htm


--
Bob Lin, MS-MVP, MCSE & CNE
Networking, Internet, Routing, VPN Troubleshooting on
http://www.ChicagoTech.net
How to Setup Windows, Network, VPN & Remote Access on
http://www.HowToNetworking.com


"ulyses_96" <ulyses96@discussions.microsoft.com> wrote in message
news:937E722A-8762-4477-899D-0A5BDC3878F2@microsoft.com...
>I have a computer which connects to my network using windows vpn client.
>my
> network is running RRAS on windows server 2003.
> the connection is good until about two minutes when it mysteriously
> disconnects.
> I dont think is a problem with the server because other clients are
> connected for exteneded periods of time.
> tried on the client:
> disabled windows firewall.
> disabled norton 2007 AV
> disabled some anti-spyware program.
>
> need help to figure out what else might be causing this.
> --
> ulyses96