Try in this way:
get Gpsdaemon
[Only registered and activated users can see links. ]
attach your card reader with card to your PC
run Gpsdaemon from command line window with option /e: gpsdaemon /e
if Gpsdaemon doesn't see card reader, use your GPS with data card instead
in Gpsdaemon select port USB and click "Flash Backup"
look at "Directory to save files", Gpsdaemon should create there gmapsupp.img - this is your map
use [Only registered and activated users can see links. ] to unlock the gmapsupp.img
Test unlocked img in BaseCamp (or HomePort if this is a BC)
If the map works, than use Sendmap to send map to data card in card reader or GPS
Sending the map will erase the original map.
If there are problem with transfer of gmapsupp to data card, run Sendmap in raw mode from command line window like that:
Sendmap -r gmapsupp.img.