Funny problem with a Panzer

[Zeb]

For some reason I cannot choose the secondary weapon in the gun position 2  in a Panzer.  I have a mixture of AP and HE shells loaded but the display says AP63 and wont change.  I have the default backspace key set for secondary weapon.  The key works fine with all aircraft and bombers I have tried.  Just seems to be the tank thats giving problems.  Any ideas ?

Zeb

[Hans]

Setup, keymapper, gunner, set a button for "select primary".

I've got mine set to the Tilde key above my TAB key.

 

Hans.

[Zeb]

Thank's Hans I will try that.
What I don't understand though is that I was in Roger Wilco contact with a fellow squad mate  who was also in a tank.  He was changing his ammo type using the backspace key without problem.  This is the same key he uses in aircraft and bombers.  We both checked the setting you suggest and found nothing was allocated.  So I am still unable to understand why he can use the secondary weapon change key and I cannot.

Zeb