Make sure the commands are not mapped to a joystick button.
If you want a clean install of the game, then remove the cache, skins, and squads foldes from the game's installation directory (default location C:\Program Files\GTC\Aces High II).
While you are there, rename the 'settings' folder. Restart the game, and everything will be like a new installation, unless you have also installed any custom sounds or gunsites.