I have a 2009 4.6 w/Tech Package that I recently acquired as a demo unit. Everything works great except when I hangup from a call when using the bluetooth feature, the system thinks the phone is still connected and does not return to music or radio or whatever was playing when the call commenced. I can place a new call from my phone and hear over the blue tooth feature, but I can't place another call using the steering wheel button. It doesn't matter if I disconnect the call from the DIS control, the telephone of if the other party hangs up. The only way to return to the stereo is to disconnect the phone from the bluetooth using the DIS control. Then if I want to make another call, I have to go through the connect function again. Any ideas on how to solve this problem?