I can't hear any audio with my iPod Nano.

If you hear the static on your radio go away when you turn the iTrip Auto on, and your iPod nano is getting power from the iTrip, then all you need to do is a simple "soft reset" of your iPod.

With the iTrip connected to the iPod, hold down the Menu button and the center Select button at the same time until the Apple logo appears. The iPod will restart and should now communicate with the iTrip successfully.

For more help with a soft reset, please visit Apple's website.