Post a screen shot of the .system folder.

You need the basic maps that come with all Garmin GPS units.
The GPS will never work correctly with out these.

These 2 file are in the .system folder.
GMAPTZ.img
gmapbmap.img

So saying you do not have any maps you are missing these 2 should always be there.
If you have a proper gmapprom.img then it should work for what ever countries you need.

How did it come that you do not have any maps in the .system folder ????