I found a map on my old computer that works.
The map name that appears on the GPS is:
CN EUROPE NT 2012.10
[1] W & C EUROPE NT 2012.10 UNLOCK BY KOR @ L
SIZE: 1.9GB

With this map the GPS works perfectly. The problem is that the map is already old.
Why will it work with this map and the other CN NT does not?
I do not know if it helps in something ..

Best regards