I am stuck on the flood gates mission of Vegas1. I am to the part were I have to manualy open the flood gates, no matter what I do I seem to die before I get anywhere. I have tryed granades, head shots, and moving down the walk way to kill the enemy as they come out of the garage. Eather I die or my team mate at the computer dies and its game over. What is the trick to advancing past this point. Please help.