i sent a map from mapsource to my nuvi1200 device and get a 'can't unlock map' message when i try to open the device. anyone can help how to unlock it. i have the product key.
What map did you send? Did you get it from this site? If so, please post a link to the map.
Since he mentioned "product key" I would assume it's a Garmin map like City Navigator.
IIRC there have been several "can't unlock map" problems associated with third party, unlocked maps. If the only map the OP's having a problem with is CNNANT, he should contact Garmin. Didn't think we commented on installation problems for maps not hosted here.