You can operate your USB device by using the remote control of the unit only if it is in the status of music playback. The remote control cannot be used to navigate through the menu of your IPod or GoGear.
You can operate your USB device by using the function keys on ithe remote control.
Note: Please make sure that you have new batteries in your remote control and press SOURCE repeatedly or DOCK on the set (or DOCK on the remote) to select DOCK source before using the remote control with the set.