Hi, I have an Apline CDA-7893 receiver in my car. This receiver claims to work with CD changer(Apline only). However Alpline claims that its products will only work with other Apline products but i have a profile Amp. that works just fine with it- SO my problem is that i have 3 pre amp outputs- Sub. -Front Out- and Rear Out. I have an ipod that i connect with a headphone jack to RCA connector to the receiver. In Auxilary mode i can listen to the ipod but none of the functions on the receiver work, ex: i cannot adjust volume, bass, trebele, frequences etc. Is this because the preamps outputs are OUTPUTS?? help please!!