oooh my bad! You're right, that was the problem. I feel soo stupid in this moment.No problem at all, I also fall for that thing sometimes.
I'd like to ask you another simple question: in the screen you've posted you have two different triggers. Do they open the same door but from different directions, right? I want to do a thing like this in my map, how can I do that? Simply I need to add a "reverse zone" (for example from palestra_zone to start_zone calling the flag enter_start_zone) and I can link that trigger to the same door?
Yes and yes you can copy the trigger and change the script_flag.
Don't forget to change the zoning in your MAPNAME.gsc
add_adjacent_zone( "parcour_zone", "binnenhof_zone", "enter_binnenhof_zone" );
add_adjacent_zone( "binnenhof_zone", "parcour_zone", "enter_parcour_zone" );