Toshiba SD-M1612 and nVidia card

Mkay, so I have an SD-m1612, I got it from a friend, and it worked fine for a while, but then I got a new graphics card (at least, I think this is the problem), the NVIDIA Geforce 2 mx/mx 400, and now it seems I can’t read DVDs properly, they get all skippy on me, and lately I haven’t even been able to get them to run at all, some error about the DVD having copy protection and I have to turn off the tv out on my card, even tho I don’t have a tv out. Is there any way I can fix all this? Thanks