I'm getting an error in Visual Studio 2008 anytime I try to create a data connection in the Server Explorer: "Unable to add data connection. The IVsDataConnectionDialog could not be initialized"

Also, the existing data connections are disabled and their icon is a red-slash-circle.

So far, the only advice I've found is here:
[msdn\_microsoft\_Forums\_vbide\_thread](http://social.msdn.microsoft.com/Forums/en-US/vbide/thread/14683181-7a23-4f01-93d5-5af3153b4cf3) Choices there include:

* Reinstall VS2008
* Reinistall .net 3.5 sp1
* rename registry for vs2008 user settings

..but I've tried each recommendation to no avail.

Any other ideas?

Thanks