Only transferred track logs show on Montana 600 gps but no track on the map

When transferring a named track from Basecamp to Garmin Montana 600, the track logs show up on the gps but the track itself and its namedoes not show up on the gps map.  The Montana setting in Track Manager is set for "Show on Map".  Both Basecamp and the Montana 600 are up to date.  The track does show up on Basecamp.  How can I fix this?