BaseCamp can see locked or unlocked map .img files with 'anyname' in either a Garmin or Map root folder. Your Oregon however can only see locked maps which have either been officially purchased for the specific device or IMG files that have been properly unlocked with <any_name>.img in the Garmin folder [directory]. Going by your info it seems that either the img isn't properly unlocked or it's not in the Garmin folder. If the path is x:\Garmin\*.img then check in GMapTool that it's properly unlocked or just run latest [Only registered and activated users can see links. ] on it again.