I don't have Win 2000 Server yet (Anyone want to sell me a legit copy?), but I have WinNT 4.0 Server (Actually BackOffice).
Some software doesn't run on the server versions of Windows (NT 4.0 or 2000). As much as I hate to admit it, this is one time that Microsoft isn't at fault. At least for all of the software that I have tried, the failure to run on the server flavor of Windows is because the application has been specifically wired not to run. This is usually because the company wants to sell their server version, i.e., multiple user version, of the same application.
I have heard of, but never tried, ways to hack the registry of Windows NT Server to identify itself as Windows NT (I've not checked for Win 2K.) Let your own conscious guide you here.
-Lost-In-America