The map does not display if there are several other maps in the device (e.g. the City Navigator Europe) - it only shows in the list of accessible maps, but it does not show up when browsing the maps. On the other hand, the older version v3 works even when there are tens of other maps loaded in the device at the same time (the sum of all map tiles being definitely higher than 4000!). Is this map possibly situated to some lower layer, being covered by the CNE or other maps?