Any idea how to get MapChanger working like it supposed.

Right now I have set MapChanger up according to rules above. Everything is set up as supposed: content of .ini file, folder names, text and map files in them (two folders: map and map_nt). Everything to the letter.
Now when I start iGO up it works just fine, no problem there. Even shows correct map selection in MapChanger.
Thing go bad when I try to switch map.
* iGO does not restart (have to restart it manually; its more or less OK by me)
* It loads very long time and finally crashes
* Inspecting SD card folder names I see they are now different from previous restart (two folders: map_ta; and map_nt). So apparently iGO does not find maps any more and crashes.

How to fix it?