When i install Battlefield 2 modern combat, everything is fine, after the installation, i add a new core.dll or ddl i think and a newer icon so i can play BF2 with no cd, when i install Battlefield 2 special forces, and i want to play it, the screen goes black, a sign that the game is loading, then suddenly it returns to my desktop withought loading the game at all.... Waht seems to be the problem here.....?