there is no map on my 1490LMT after I update to NA 2014.20 even I see on my 16 GB Micro SD Card had folder Garmin (gmappupdate = 0KB), Folder Map which 3 files (gmapupdate = 3KB, gmapupdate = 1756128KB, gmapupdate = 1KB), But nothing at \Tools, Settings, Map, Map info

My 1490 useless now, what can I do, Please help