My son has had his cmt-v11 cd flat micro system since June with no problems. Now when he put his ipod in the docking connector it wont play his music through the speakers- it just comes out from the ipod itself- I have checked the other modes ie cd player and radio and thats fine, the speakers work ok. This model is the one with a retractable tray where the ipod sits in, not connected by a usb cable- any suggestions of what may have happened?