I have a Kenwood KDC-MP7028. It has a 2-channel RCA Aux. Input in the rear. I ran a splitter to convert it to 1 RCA male from 2 females, then a converter from RCA to 3.5mm male. I plug in my iPod, and it neglects half of one of the 2 stereo channels, or an entire channel completely. I've triple-checked wiring, even used new wires, splitter, converter, still the same faults in audio. any reason why this is messed up?