"Ref the red box. That is an indicator that frames are being missed, and your PC is potentially overloaded drawing the screen. Reduce the frames per second in Setup->Display until the red box goes away, you might be able to use DirectX engine which will help depending on your hardware, also in Setup->Display. Turn your fps down, at least 5 frames or so after the red box stops showing.
Richie MW0LGE"
Duncan