Wire,
The only thing that comes to mind to me right now is that the wrong axis is being used for rudder.
Go to setup, joystick, select joystick. When you are on the select joystick screen make sure your joystick is selected in the center window. On the left window highlight rudder and make sure RZ axis is highlighted on the right. If it's not then highlight it and click on set input. Hope this helps.
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MarkAT
"It is not the critic who counts,
it is the man in the arena..."
Teddy Roosevelt