I've tried to update firmware and now I have lost control of the iPOD.
I have updated the firmware to GW 100 1.22 firmware update.
I managed to create the playlist GW100_Update_Files_-_G1201.22[1], which contains 'GW100_Update_Files_-_G1201.22[1]' plus 616 other files.
I have followed the instructions to install the firmware.
Now the menu says 'AUX GW' or 'no iPOD'

Relevant info:
I've tried it with Ipod nano - 4th gen and iPHONE - both worked previously, neither work now.

Its the Concert stereo

I'd appreciate any help that anyone could offer