So I'm playing the mission "Battle of Al Alamein" and I get to the part where I have to locate a radio on the second floor of some building... thats the objective. I locate it and complete the objective, and then nothing happens... the "star" on the "radar" doesn't disapear, and when I press TAB there are no more objectives. I run around trying to look for stuff to do but its like the game just stops... all the troops stand there looking around. What gives?