Vista VPN config for Server 2003

It could be the cached credentials issue. try to cache the credentials use net command. these link may help,
Can access remote computer via VPN occasionally
The VPN user may lose the cached credentials and may need to use net command to re-cache the credentials. To do that, we create a batch file including this ...
http://www.chicagotech.net/casestudy/vpnaccess1.htm - Similar pages

VPN Issues
Can ping VPN server but receive System error 53 using net use ... You are using local computer credentials to access the remote domain/workgroup network. ...
http://www.chicagotech.net/vpn.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
"Russell Reid" <RussellReid@discussions.microsoft.com> wrote in message news:F9366D46-8ABD-4773-BB79-B5D36D24B9C6@microsoft.com...
I have been trying to create a successful VPN connection to our office
network in Vista Business. After working through several discussion groups
and web searches, i still am having issues seeing network shares after a
successful VPN. Here is where I am:

I can create the VPN connection and recieve a valid IP from the Domain
controller. I can ping and remote desktop to any machine in the office
domain. But I cannot access the network shares through mapped drives or DFS
shares. I CAN use UNC paths to access the named shares, but whenever I try
to access a DFS share or a mapped drive network share, I recieve a
permissions error. All permissions are valid when the machine is hooked up
directly to the network. It is only through the VPN connection that the DFS
shares are not accessible.

Laptop is Vista Business, Servers are all Windows Server 2003 R2 with SP2. I
have IPv6 installed on the Domain Controller(which is also the DNS server).
We have a separate File and Print server where the shares are hosted. We VPN
through a watchguard X700 firewall. I have all current updates installed on
all machines. All VPNs from Windows XP pro boxes work without problems.
Only the Vista box has the issue.

What am I missing? Is this a DNS name resolution issue? An IPv6 issue? An
active directory issue? Something else? I am the sysadmin for our company,
so I can make any config changes that are necessary on either the servers or
the laptop. I would like to get this fixed before we buy any more Vista
boxes. Thanks
--
Russell Reid