Just a small update...
Even without any files/controllers, twin 37mm still freezes the game (removed sim, cam and zon file)...Definite sign that the problem is in 3D object...Somewhere...
When I was removed twin 37mm cam file, I was able to use manually front flak and in order to access front gun station I had to click rear flak gun...
So, all is working, it's just a matter of camera/station controllers settings. Somehow , I think the solution may be in camera.cam file. It's like some camera "definition" is missing...