Hi. I bought a aftermarket aux connector to my -03 x5. The cd player is marked with june-03, the car has integrated wireless telephone i the armrest. I took out the mid and cd, unplugged the audio cable from the phone, plugged in the aux cable. But no aux mode is comming up. Only jumps between cd/radio. I have a also tried with an cd player marked dec-05 with no luck. Do i need the genuine bmw cable or is anything else wrong?

Thx in advance