Ok sully, given at this point in time you have reinstalled your driver for your wheel.
1). options/controllers select wheel/joystick.
2). " " select throttle type seperate
3). options/controls/axis > press the gas then the brake, you should see the blue and yellow axis indicators move from left to right.
4). assign each function to it's corrisponding axis.
try press the "i" beside the axis indicator to invert the axis, if this does not work, make sure all the axis are centered > then select the "callibration lock" feature.