i recently updated my card from a 64mb card to a 512mb car the NVIDIA geforce 7600 GS, AGP 8X i brought this mainly to play battlefield 2. i could play games such as Warcraft, enemy territory, resident evil 3 before on my 64MB card but after installing this new up to date one each time i load warcraft the screen is basicaly red and flashes iv installed the driver which came with the card and tried the one from NVIDIA website on top - no luck still the same problem... can anybody help me please?

windows xp SP2
799mhz with 640mb of ram (very low i know)
AMD Athlon processor