Mixture lever n° 1, no mouse working.

HI guys.Since last week i have a problem controlling mixture lever n° 1 in multiengine props and turboprops.I point on it with the mouse, the pointer become an open hand, i click on the lever and the hand closes but when i drag the lever down this not moves!!!I try to do the same thing with a tre and a four engine aircraft but is the same thing, the lever n° 1 can't move.i test the correct configuration in the control panel windows and is all correct.I tried to sobstitute all the gauges with new one (i have another PC with a clean FS9 without sceneries and other addons!!).I can control the mixture via ctrl+shift+F1/4 keys but i like very much controling it in the VC with the mouse. I have a Thrustmaster HotasX joystich with engine lever.W7 64bit, E6800@4,2 GHz, 4 MD RAM corsair dominator, 8800GTX. 1HD for the OS,1HD for FS9+1 for FSX(two partition of the same) and 1 for addons. Tank You !