36 degrees

can't find it

I try to run Discworld 2 on WinNT, but there's this problem: the mouse is stuck in the upper half of the screen and i can't reach anything in the bottom half. There's no such problem with other DOS games, so i thought it might be because of the SuperVGA. Do you have any idea how i can fix that, and is it possible at all to make it run properly? Pleeese post if you have the slightest idea, cos i'm desperate . thanx