When I apply any longon theme (other than the Win XP default, that is), I get this error.

Titie: Parser Message

Prompt: Value creation failure '' at line 328

Options: OK

Also, the background is totoally black.

After repeated clicks on the OK button ( the same error pops up a few times more), I am directed to a computer locked dialog. The one that says, this computer has been locked by who and he or the administrators can unlock the computer.

I didnt make any changes to logon studio, neither do I have the knowledge to.

So, what's going on?