VKB Gladiator MK2 Button recognized but not working

Hi,

i have a Gladiator MK2 (the old one ww2 style).
I can config all axis fine, but when it comes to the buttons WT is kind of strange. My button for instance Fire Gun/MG is set for the front trigger button of that joy, and the configurator accept it as keypress. Ingame when i hit that button nothing happens - no ratttattaaa!?. if i use one of my throttle buttons, for the exact same definition (or additional) then fireing works, but its impossible to bring the Gladiator trigger or top button to work ingame. All virpil cm2 throttle buttons are working, but non of the VKB ones. or at least trigger and top button i tried and neither work when sitting in the plane.

There are no additional functions set for that button. I am clueless - can’t play that game when i am unable to shoot.

Thanks for help in advanced
Daniel