Brian, couple of things you want to try and do. first, use a different cable. Second, make sure your dock connector is free of debris, corrosion, and that it does not have any broken or bend pins. After that, you may have to consider replacing the battery. It may be past its lifespan and no longer holding a charge. [guide|633|Here is] the guide for it. Of course you also want to try a reboot by holding power and home button (at same time ) for hard reset. Hope this helps, good luck.