Sounds like the WINCEIMG.BIN that was used to flash is not compatible with your device. Is it a F500BT ? If so, then you are have the same experience as me. I ended up flashing my F500BT back to 2.0006 (my unit is North America) with the WINCEIMG.BIN found in the official Pioneer update zip file. And then of course copy back the My Flash Disk folder from backup.