ArmA II Help Please.

[elh_2009]

I allready posted in the Official ArmA II thread but i figure my post could get lost because of the size of the thread. I never played ArmA I so im a bit of a n00b, im on Amphibious Assault, my team keep dieing. I'll go off one way with a another member of the team and a couple will go the other, i do ok but my team mates keep getting killed. Ive tried going different ways but there seems to be a machine gun killing my team, am i doing something wrong? I like the game but it seems quite difficult at the moment.