Aces high closing itself when I log in

[Belial]

I just changed my contrast in the Microsoft graphic properties because everything looked so dark, I just figured out how to do it today.  The problem is aces high instantly closes when I log into an arena unless I run the game as administrator.  I tried reverting back to the default contrast properties and even reloading AH2, still same problem. 

I am at my wits end what have I done?

[batch]

you screwed up the default settings on your cheat code ....... ROFL

kidding aside...... go into your AH folder/settings and find the videi8.cfg file ..... delete it

usually fixes video issues like that