Having trouble with controller and left 4 dead

So i was just messing around with my ps3 controller and trying to get left 4 dead to work.

Basically the problem is i can't get the right joystick to become the aim(bare with me, i was having trouble describing it), while i ccan get the left joystick to become my move and strafe.

I have been messing around with the configurations for i dont know how long now and i just can't get it to work. Any help/insight would be very appreciated.