The first thing to try is this:
1) close all VS instances and then delete the folder contents
2) Folder:
C:\Documents and Settings\[Username]\Application Data\Microsoft\VisualStudio\8.0\ReflectedSchemas
in VS 2005 XML Schemas are automatically generatedthem using reflection on Web controls. So if something got "out of whack" that's where you want to get rid of the results and try letting them get regenerated.
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