This is my first post, I have a nokia ck-7w fitted in my BMW E90 320d msport however the aux-in connection is not working. I have no idea on what it could be. The nokia-ck7w is working correctly i.e. when i get a phone calll the radio mutes etc. However when i plug in my ipod through the aux in connection i get no sound the BMW professional radio is successfully going to the aux in option but no sound. Please help.