I don't know, I have VS 2005 and SQL Server Express installed on a few
machines here with no problems with Outlook addins. Is your addin code
referencing SQL Server in any way?

I haven't tried any addins in a setup like that which use the Outlook 2002
PIA's however, my setups all have the Outlook 2003 and/or the Outlook 2007
PIA's installed.

--
Ken Slovak
[MVP - Outlook]
http://www.slovaktech.com
Author: Absolute Beginner's Guide to Microsoft Office Outlook 2003
Reminder Manager, Extended Reminders, Attachment Options
http://www.slovaktech.com/products.htm


"Michael" wrote in message
...
Well, I isolated it to SQL Server. If you install SQL Server (I
downloaded SQL Server Express for this test), it conflicts with the
add-in, so it has nothing to do with Visual Studio itself. Any ideas
anyone?

Michael