I have already check nvidia forum and can't find any help. If i don't use antialiasing, my FPS goes about 65, i have even try software and direct draw, Its even slower...much much more slower. I'm now thinking of reinstalling my XP and only use Direct X 8.1. I think its because DirectX 9.0 is giving me the problem.

Thanks for your feedback anyway. I'm reinstalling my system now. Will keep you inform of my update.

Thanks everybody.