NHF – new heroes for Heroes V 3.1.

Hello, I have a problem. After I used your program to modify the map, the portals and ladders stopped working – it says there is no exit...
Here are the maps (created using RTMG): http://www.mediafire.com/download/lo7wq2zyns9inw4/Maps.rar

The maps only have script names added to some objects and a link to the script file. There are no other changes in the map.xdb file. And, of course, NHF-Names.lua has been added. But how could this affect the accessibility of portals?

Added after 1 hour 17 minutes
I suspect that the portals and ladders are not working because the monsters are standing 3 tiles away from their position. The mod specifies a maximum distance of 2, although even at 3 tiles, the monster prevents passage.

Added after 2 minutes
Here is a diagram:

M M M o o o
M M A o M o
M M M o o o

M - monster
o - guarded by a monster
M - blocked ladder tile
A - active ladder tile

Even though the distance between the center of the ladder and the monster is > 2, all free tiles adjacent to the active ladder tile are guarded by the monster.