I’ve previously written about Internal .Net Framework Data Provider error 6 and how to obtain the hot fix to fix this issue.

It appears this hot fix never made it to .NET Framework 2.0 SP1 and there is a special fix (and KB article) to apply because the hotfix mentioned in the previous post will simply not work.

To get the hotfix for a .NET Framework 2.0 SP1 installation you’ll need to request a fix for KB948815 in the hot fix request web submission form.