.net - failed to create app domain

just looking for abit of guidance here if possible. I recently downloaded a .net component for VS 2008 to handle sftp. After struggling with it for a day i uninstalled and deleted it. When going back into VS 2008, any of my previous projects have this error at the bottom in the error win开发者_开发百科dow:

failed to create app domain.

I was going to do a re-install, but is there anything I can try before I resort to this?

thanks again

DD

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sorted it in the command prompt with caspol -reset