iPad/iPhone/iPod doesn’t charge or play audio in iPod mode.
iPad/iPhone/iPod is not docked properly – Undock your iPad/iPhone/iPod from the iW4 and check for obstruction on the connectors on your iPad/iPhone/iPod, or 30-pin dock connector on the iW4.
Reset your iPhone/iPod - Please see the user manual or the Apple web site for details. Typically, holding the sleep button and the home button on a newer iPad, iPhone or iPod will reset it.
Upgrade the software on your iPad, iPhone or iPod to the latest version by connectingit to a computer with iTunes installed and checking through iTunes that your unit has the most recent software. Update if needed.
Verify that the iW4 is compatible with your iPad, iPhone or iPod:
iPod touch (2nd, 3rd, and 4th generation), iPod nano (2nd, 3rd, 4th, 5th, and 6th generation),