[Bipolar God]

As you guys can tell from the question I am brand new to this game. Anyway, everytime I have the cross-hair on someone and pull the trigger, nothing happens. I usually empty a whole clip on the person I am trying to shoot, but I miss everytime. I mean, I am usually very close to the guy and the cross-hair is dead center, but somehow I miss. Could you guys please help me out on this and tell me what I am doing wrong?