Rotation problem

[gdg76]

I'm having some problems with vertical ROMs- I'm trying to run them on my PC monitor.  I'm running on an nvidia Geforce 64M PCI card. 

I think I have the rotation set up right because the MAME check screens (with resolution screen where you have to hit OK) are oriented right.. then when it goes to the actual game, it gets rotated the wrong way.

I'm thinking it's the video card doing this since the check screen comes up right.  However, I can't find any auto-rotation options on my card.  Anybody else have any other ideas what it could be?

Thanks
Drew