Dexxa steering wheel problem

Ok, I have this very annoying problem... I can't calibrate my Dexxa wheel right, it works cool on other games but not in GP3.

When I calibrate my wheel, it gives me weird ranges... example when I steer to right, it doesn't give max rate until I press gas pedal! And same to brake pedal, I need to steer left, then it brakes to max...

Anyone know how to solve this? Couldn't find any info about this anywhere...

Thanks!