Hi David,
First make sure you XP clients have the following Patch installed.
329170 MS02-070: Flaw in SMB Signing May Permit Group Policy to Be Modified
http://support.microsoft.com/?id=329170
If you have kept up with the Critical Updates it is most likely installed
but not having this installed on XP will cause the issue, as Windows 2003
shipped with patch on it already. To check on the XP system look in add
remove prgrams and see if 329170 is listed as installed. If not I would
suggest hitting the Windows Update site and downloading and installing all
the Critical Updates at the very least.
Please let me know if this is already installed. If it is I'll send give
you some additional Troubleshooting steps.
First and foremost I would disable the Idle TimeOut on the server. Really
easy to do, from command prompt
net config server autodisconnect:-1
Hope this Helps!
Alan Wood[MSFT]
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