Conversation Between rnl and CO997

I saw a really old post where you explained how to stream pandora from your iPhone thru PCM. You mentioned creating a bluetooth link on the AUX Bluetooth to your smartphone. Select that link as your source on the PCM. You can stream anything you can download and still answer the phone through the PCM.
I understand how to pair the phone with the car but don't get the AUX part. I was at the dealer today and he couldn't figure it out either. I got my phone book loaded but i could not get music to play. What part am I missing?