80040154|Class_not_registered

I am troubleshooting an ASP application running on a Windows 2000 server.
Until recently, a client-side cursor (recordset.cursorLocation = 3) could be
used successfully. Now a "class not registered" is raised by this code.
However, a server-side cursor (recordset.cursorLocation = 2) does NOT raise
an error. I need some help in determining the cause of this behavior.

Obviously, something has changed somehow on the server. I have reinstalled
MDAC 2.7 SP1 Refresh to no avail. The code works on another similarly
configured server.

Regmon shows no access denied, and Filemon shows no failures.

Thanks in advance for any assistance rendered.
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