When i plug my Phillips MP3 player into my Deck my subs will not play. I have Auxiliary input in the back with 2 sets of RCA ports. I have the amp RCA's running off one and the mp3 player plugged into the other one.....the subs will play with the radio and cd but when i switch the radio to aux mode the subs cut off. What can i do.....NEED ASSISTANCE!!!!!!! P.S. I have a Pioneer CD deck with Auxiliary Inputs...