Tanouche

Hi there, I would like to use the front command dial 1 (by the way I don’t know how to select dial 1 or 2 anyway) for aperture, I did set it up but it is not responding, I have my aperture ring on A using a 27mm2.8.And I set up the rear command dial on exposure compensation but it is not responding as well.It’s frustrating, thanks for your help. Tanouche