I recently upgraded my Domain Controller Server (hardware and software) from NT4 Server to a clean installed W2K Server.

Since this upgrade I am having connectivity problems from all my Workstations (all XP Pro) to the Server. First of all, they take alot longer to login compared to when the server was NT4 plus the time they take to login varies (anyware from 1 to 5 mins). Secondly, intermitantly unaccessable mapped network drives.

The strange part is the server always responds to ping requests (even left going overnight with "ping 192.168.0.1 -t") in less than 1ms time and I never have problems with the Internet Connection Sharing, it always works even when the network drives are unaccesable (which indicates that it's not hardware).

It appears that network requests that are purley TCP/IP (like network games) and TCP via the ICS Service work fine, there is only a problem with services related to "Microsoft Networks" (logging in, mapped network drives, remote Computer Management, etc.).

My question is; are there any known problems with XP Pro to 2K Srv connectivity or where should I begin to try and fix these probs.

All systems are running latest service packs.

Thanks in advance,
WS6