Have this unit. I'm having some issues. I have the USB adaptor plugged into back of unit. It works only sometimes. I plug my iphone 5 cord into it. Most of the time it doesn't even read that I plugged in anything. I have gotten it to work. To play some songs from utube. While it was playing, it stopped a couple of times and said it had an error. Then it wouldn't even read it any longer. Is there something wrong with the adaptor? Or is there something that I'm not turning on the unit itself to work correctly? If anyone knows what could be wrong or if this has happened to you, please help me!! Thanks so, so much.