I just got a Pioneer AVH-P4100DVD unit to replace my DEH-P700BT unit. The P700BT had no issues playing music off my Hero through the USB cable attached to the receiver (just have to mount USB). The P4100DVD however when connected just says "format read" and will stay there. Just trying to figure out if there is a work around to get the USB cable to work with the P4100DVD?? I miss being able to control the music on my phone from the receiver. That is why I am not using the AUX jack. I have also tried turning the USB debugging on and off on my Hero. I know the USB works. I plugged in a thumb drive and it read the music fine. Any help would be greatly appreciated. Thanks!!