Hi there. I just saw a lot of messages, "unable to unlock the map". I suggest to use GMapTool. From the command line just execute gmaptool.exe -w -u [your-25-digit-code-here] gmapsupp.img and transfer the gmapsupp.img to the /Garmin folder on the SD card. It's working. w key just overwtites the same image file (inserts new unlock code).