As of a couple weeks ago, I discovered I can't operate GVs any more.
Yes, I know you hit E to start the engine.  I know you hit Q to put it in gear.
The engine starts, and I can change the gears.  But they won't drive when I press the joystick forward.  The turrets won't turn and the weapons won't fire.
The PT boat will go, in a very straight line, when I hit full throttle, but I can't fire or rotate guns.
I get a message that I'm using "Control Mode 2" when I get in a GV, but I don't know if that's the problem, and I don't know how to change it.
What could have caused this?  It worked fine for a long time.
Help!