Xp = Upgrade's?

i jus upgraded my syestem if u could call it that… 2 Xp. from ME. N now when i try to play a game… it say (( The selected Open GL mode is not acsepted by ur video card )) now i had a vid card… took it out … bin playin jus wit Open GL for a lil bit. on ME… but the second i go to Xp. it start to say that. but b4 i never had that problem. is there N upgrade sum where that i need or what? or should i jus wait til i put my new vid card in. but i would like to play now. oh! N it will let me play on Softwear. an Direct3D… witch r both bootee!! i think. 3D laggz to much for me… well ne help would b welcome… thx.