Help us out here. . . what plane and what are you controlling it with-- joy stick, keyboard, yoke?
For a moment I thought wow technology FSX must have smell as well.
Have you tried recalibrating your joystick? Turning up the sensitivity of the rudder? Contacting the people who made the aircraft?
Well, I think that the rudder sensitivity affects the steering sensitivity as well, but I'm not sure.
Only one good way to find out: try it.
And then let us know.