I'm running 2.0-b11 and Hijack 253 and everything had been working great, until I added a RM-X4S. I purchased it new from Crutchfield and plugged it into the tuner module. Unfortunately it rarely works. Occasionally on power up all buttons on it function, but normally only the "source" and "off" buttons if I'm lucky. I've checked and re-checked all the connections without any success, and the button test option in Hijack doesn't show any results on these "dead buttons". Is the problem a bad RM-X4S (exchange with Crutchfield), a bad tuner module (still under warranty), software problem, or something else. I should mention that I have also tried my "spare" RioCar running v1.03 without Hijack and get similar results. Is there a way to test the RM-X4S? I could sure use some advice on troubleshooting this, since it is driving me mad. Regards, Mark