#5 Can not uninstall/install

[ICT CC]

On uninstall of the Add In I get this message:
"Unable to get installer types in the "<path to
nunitaddin.dll>" --> One or more of the types in the
assembly unable to load.

On startup of my VS.NET IDE I get an Assertion Failed
exception. Probably on loading my NUnit AddIn.

Both error messages are attached.

I just upgraded my Office from XP to 2003.

I would like to have the AddIn also available for NUnit
2.2.0.

Any help would be greatly appreciated!
Thanx.