iPhone 4 Ipod Function in 2010 535

Looking for advice. My old 3gs phone integrated perfectly with the factory connector (USB+audio) in my 2010 535. BUT, my Iphone 4 will not play music. The USB element seems to work as I see music content through the idrive; but no music. When I reconnect the 3gs, it works fine...so Everything is plugged into the inside console...Is there a new adapter cable for iphone 4?? Thanks -

wait for 10-15 minutes. It takes sometime for it to integrate with the car, specially if you have lots of music, podcasts, etc.. It happened to me in the beginning. I would see the list of music, strated to play, but there was no audio.