A wile back my friend added a radio shack cable that went into my Input from the rear of my Pioneer z1 (see pict). I recently purchased a Apple Iphone4 and trying to use pandora from the headphone jack and it doesn't appear to have any sound at all. I tried to add a couple of other sources and still no sound? Any ideal what im doing wrong. i checked the settings on the unit and have an open line on Aux. Do i need to purchase another cable to get this working?
Thanks

