Is it USB?.
What Operating system?
Have you reinstalled drivers?
Have you recalibrated the wheel on the custom advaced settings?
Have you tested the wheel under the test options in Controllers
Also in controoler settings tab definately have that in combined,otherwise it will do all s/@!#$.
Believ me i have majored on s/winder setting up this w/end,a game in itself!.I have got my system to run it solid after a long while i am now enjoying the game bugs as i can now blast it.Gettinng 49 f/p/s at 800 600 custom settings but not bare min the cars look coool when the sun glints,The sky messages cripple the gfaphics who it has to be said,ant idea on removing them