I think i understand the problem, looking left and right is absolutely fine, but when i look about 40 - 45 degrees up or down parts of the screen flicker and show me the centered view.
So say if i was looking up so far that my gun was out of view, the flickering would show my gun because it's centered, i tried to make a video to show you guys what i mean but when i use fraps the problem goes away...
This problem only occurs using TrackIR and only in Arma 2, i hope someone can help me.