The EXACT same thing happens to me with my 08. Sometimes my ipod will play and then it just quits for no reason. I too have changed fuses, connector cords, and trying to update the software with a usb download. When I put in the thumbdrive in the port it didn't see it. Of course I hesitate to try it when my ipod is working. It will start working again with absolutely no warning and play again for a while. My local ford dealership was unable to come up with anything except a bad fuse, but it happened again after I changed the fuse. Please post if you find a solution. Thanks.