XP PRo Client dropping out of network

Over the weekend, I finished up a roll out on a new Win
03K Server. The machine is set up as the PDC, and File
Server. The only issue I have left to figure out is why
the XP Pro Clients are dropping off the next work. All
the NT4.0 Workstation Box's do not have this problem. It
appears to happen when the clients have been idle for
several hours.

I have looked over "session", and all are set to never
expire. I'm almosr certain, I have simply over looked
something. Can anyone offer any potential causes?

Thanks

Did you find anyhitng on this issue? I am having a
similar problem where I upgraded a nt4 server to 2k3 and
only the XP Machines are doing this... nothing else.
Seems very very slow to login too
>-----Original Message-----
>Over the weekend, I finished up a roll out on a new Win
>03K Server. The machine is set up as the PDC, and File
>Server. The only issue I have left to figure out is why
>the XP Pro Clients are dropping off the next work. All
>the NT4.0 Workstation Box's do not have this problem.
It
>appears to happen when the clients have been idle for
>several hours.
>
>I have looked over "session", and all are set to never
>expire. I'm almosr certain, I have simply over looked
>something. Can anyone offer any potential causes?
>
>Thanks
>.
>