stick + control surfaces jittering

[CoolingThunder]

So yeah, if I move the stick from left to right, or up and down, the stick acts "jumpy". It isn't a smooth motion. Same goes for the surfaces outside (ailerons, elevator,rudder) They also act jumpy, they don't move in a smooth animation. I am able to run the game on very high setting, so that shouldn't be a problem. The problem persists if I turn down the graphics as well... Is this normal, or is there a solution for it?