Machineguns don't work in 109-e4 ?

[cianw1]

Wasnt quite sure under which catagory to put this thread.

I hadn't played CoD in a while and started again yesterday. For some reason in the 109 e4, my machineguns don't work, although my cannons do. At first i thought it was a problem with controls or something but in a 109 e-3 the MG works fine, and also it does in the spitfire. I checked the loadout and it does have nose guns and wing cannons set up.