Win2K3 + Citrix MetaframeXP server

I have a Win2K3 server with Citrix Metaframe XP server running on it. It seems like the terminal services freeze up on it until a repair on the NIC's is done. Currently the solution is a scheduled task (Batch file running - arp -d; nbtstat -R; ipconfig /flushdns; ipconfig /registerdns)set to run periodically. This resolves the issue for a while. I have not been able to figure out a pattern as far as time frame. I can provide more info if anyone is intrigued by this and feels the desire to help out.