Most probably, if its a copied CD, then it wont play, because the physical-authentication parts of the original may not be present in the copy. Safedisc protection is normally cracked by many groups... And maybe the crack which worked till now, is not working anymore, that is all. The game is fine, the crack has incompatibility issues with SP2 somehow... Nothing can be said for sure, since rule #1 is "no cracks"...