I have tried "gmapsupp.img" and "gmapprom.img" neither of which will show up. Garmin is working ok and the base map is fine, just no detailed map. if i look in settings it shows up as an unlocked map on my sd card but will not show on the map screen either through browse map or navigate screens.

could it just be that the garmin version on my mio is too old to read the new detailed map?

any suggestions would be appreciated.