I've been walk through the singleplayer game for several times in the last (over) 10 years, now my PC is broken and I've installed the game on another. Now I can't get through the map where you have to protect the team and the submarine with controlling the Predator drone in Russia. The enemies are not comig, there is NOTHING HAPPENING. This is the first time for me this error occured. What do I do?? Pls help I love this game!! :((((