movies wont play

ThunderRaiden

Guest

I have a comp with 512 DDR RAM, and a 256 MB Video card, yet 50% of the time when i was movies in .avi, .mpeg, and .wmv, they all turn completly green sometimes, i dont know y it happens, i updated the video card drivers and all, this didnt start happening until after i upgraded from a 64 MB video card to the current one, so anyhelp? its a GeForce 5700 Verteo or somethin another.