>>Do you have the XP Firewall enabled?
>
>That's a good guess, but no I don't have that running. Here are some more clues...
>
>SQL 2000 is installed as a named instance on a machine that also has a SQL 7 installation. I did that so I could continue to support SQL 7 databases/apps while also creating new SQL 2000 apps. And oddly enough, I can connect to the SQL 7 installation on this machine without issue.
>
>I may end up taking one of these installations off this machine, as there appear to be other problems with this dual installation that render the benefits I had anticipated almost useless. I'd hate to take 2000 off, but supporting the older stuff may have to take priority at this point.
>
>Thanks for the reply. Any further ideas from you or anyone else would be appreciated.

This is a SWAG, but is it possible you installed SQL7 after SQL2K? Maybe some .DLLs with the same name got overwritten with older versions that don't work properly with SQL2K.

All this assumes you're trying to connect with a valid user name/password, that SQL2K is installed with the proper authentication configured (NT, SQL Server, or mixed-mode).