most probably you copied all .nfs files for map and poi which came along with the maps so your device doesn't know which is suitable for your device. I would go with these two (bold):

MapDrawer_High.nfs
MapDrawer_XXHigh.nfs
MapDrawer_XXXHigh.nfs

Poicats_High.nfs
Poicats_XXHigh.nfs
Poicats_XXXHigh.nfs

..or you can try another two in case it still won't be OK.