have you got the driver installed correctly.? use the newest driver.. 5.10
this is the same driver used for the G25, and G27, make sure you download the proper one for your system.
win 7. vista 32 or 64... install and follow the setup guide, calibrate.
set FFB 100%, everything else to 0, click to enable centering spring, but set it to 0,
do not use combined pedals, and check to let game take control... you should be good to go.
once you have everything working , the game should see it, as i use the same wheel.
then you can set the buttons to do what you want, and save it..