Custom ERM scripts are not working in the game.

Hello, friends. I decided to study ERM a bit, downloaded the reference manual, and the script editor (haven't gotten to it yet), and decided to simply test whether a basic script would work or not:

ZVSE
!#VRv1:S0; [set variable v1 to 0]
!?LE0/0/0; [visit event in the northwest corner of the surface]
!!VRv1:+1; [add 1 to v1]
!!IF:M^You are the %V1 visitor of this northwest corner of the surface!^; [show message]

I created a map, placed a hero on a cell below the event, loaded the game, but when I enter the cell, NOTHING (!!) happens. On other ERM maps, scripts (not mine, of course) work perfectly. By the way, when loading, a message box appears like this: "An ERM script was found, do you want to vogify the map?", i.e., the game sees the script, but it somehow doesn't execute. Question: what needs to be done to make it all work? Thank you.