Debugging no longer works for me in VS.NET 2003. The Excel splash screen flashes briefly but then disappears when I try to start debugging. My belief is that installing SQL Server 2005 Developer Edition is what broke debugging. I can say I had a similar problem with debugging web apps, but when I uninstalled ASP.NET 2.0, debugging worked for me again with web apps. Does anyone have any idea how VS Tools for Office 2003 and SQL 2005 can coexist peacefully? Thank-you!