You can't have the brakes mapped to BOTH axis AND keys, it won't work. Un map keys. Next be sure they brake axis work in windows calibration. Once your sure they work in windows, load the game and goto the map controllers page. Select the pedals from the drop down box and open the advanced window. Move your left brake and look for which axis is responding in the list of axis, select it, calibrate it, and assign it to the left brake (analog) Do the same for the right.