Monitor darkens when playin Mohaa -1 reply

My montor darkens when I play Mohaa, I have to keep on going into the main menu and click on the brightness slider and it will be fine for about 1-2 minutes then it darkens up again, Iam running a XP Pro 64 Bit System any help would be great

um might be due to having too many background tasks running, or a compatibility error. try running in a different resolution and see if it helps any.