Joystick control

[struths]

Hi
I've just bought cod through Steam so presumably it has all the latest bug fixes etc.
My problem at the moment is getting the aircraft to fly straight. I've configured a speedlink Black Widow flight control thru the control setup. It's responsive and all seems to work correctly. Problem is when I take my hand off the j/s the plane starts banking right and the nose rises.
I tried configuring the trim controls thru keys but this had no effect.
I have loaded latest drivers on my windows 7 os but am obviously missing something.
PLEASE HELP