BKW,

I'm not sure if you're running on a 64-bit server or not but that was pretty much the same behavior I experienced. In the links above, there is this...

Additional Info:

The link I posted above was tailored to SQL Server 2008. There is a SQL Server 2005 version of the page.

http://msdn.microsoft.com/en-us/library/ms141766(SQL.90).aspx

I had a "Class Not Registered" error on...

I haven't seen this article linked in from this post and it appears that 64-bit is a factor to some of the discussed concerns.

http://msdn.microsoft.com/en-us/library/ms141766.aspx

Key Excerpts:

The Run64BitRuntime project property applies only...