ok im in act 3 and my mission is hold the fort .......so i do that and 15 mins later it says kill the city centers so i do that but after all that is over with the game wont stop and show me a cut sence it wont say i won or anything the game will go on......so i tierd it again from da beginning of da mission and same thing again and again......so im wondering what am i doing wrong y cant i pass that mission