Since you refer to the DOS and DPMI versions I'm assuming you're having these problems with the door version of the game. I don't have any experience with the door version, but I can tell you that XP dislikes 16 bit applications more than other versions of Windows.
You may want to consider switching to the TWGS server, which can be run through Synchronet via RLOGIN, is far more stable, is less of a pain to set up, offers up to 26 games from a single installation and is -very- actively supported, with new revisions released on a regular basis.
I know this isn't a fix to your particular problem, but it would put you in a software package that is much more actively supported.
Lisa M. Wilson
aka Rave
uhndagrowhn bbs
uhndagrowhn bbs
telnet://uhndagrowhn.merseine.nu