I have fitted a Alpine chm s630 cd changer to my 2006 cooper, the wires were all there ready to plug into the small black box so was all very easy . The head unit displays no magazine when i try to switch the changer on and yes the magazine is in and full of discs . I swapped with a friends genuine mini cd changer and the same fault shows "no magazine". There is definately power at the changer as magazine ejects and loads ok . Any fixes for this anyone ?