Subsonic Steering Wheel problem in Dirt Rally 2.0

[Bodgerog 0]

Hi 

I have recently received a PS 4 and Dirt Rally 2.0 played perfectly well using the PS 4 controller, I purchased a steering wheel for greater reality and the wheel that I purchased is a Subsonic Racing Wheel Universal and my only problem is that the control foot pedal for brake / reverse only produces braking NO reverse have you got  any suggestions as to where I am going wrong as it only appears to happen in Dirt Rally 2.0 and no other game that I possess.

Regards

Roger Stoneley