[mdefehr]

I had this problem too

Without disconnecting anything (as far as I knew, anyway) I came home to find none of my recordings worked - same message. I tried reconnecting, rebooting, unplugging several ways - finally it worked with Jetranger's advice (leave data cable connected and unplug power from extender for a full minute).

It looks like you may have to try it a couple of times.

I was also relieved... these things are scary