Problem when loading map

[Nye]

Tried the script in Pandemoneus map and also tried the script nkmol suggested me

Still won't work :<

This is my current script:

Spoiler below!

void OnStart()
{
SetEntityConnectionStateChangeCallback("leverbooks_01", "StateChangeLever");

AddEntityCollideCallback("Player", "LetterArea_01", "Collide_Area", true, 1);
}
void StateChangeLever(string &in asEntity, int alState)
{
AddDebugMessage("called StateChangeLever", false);

if(alState == 1){
SetLeverStuckState(asEntity, 1, true);
SetSwingDoorLocked("mansion_1", false, true);
PlaySoundAtEntity("", "unlock_door.snt", "mansion_1", 0, false);
PlayMusic("010_puzzle01.ogg", false, 1.0f, 4.0f, 3, true);
PlaySoundAtEntity("", "unlock_door.snt", "mansion_1", 0, false);
}
}
void Collide_Area(string &in asParent, string &in asChild, int alState)
{
SetEntityActive("note_letter_1", true); //makes letter appear on the floor near the door
}

//===========================================
// This runs when the player enters the map
void OnEnter()
{
}

//===========================================
// This runs when the player leaves the map
void OnLeave()
{
StopMusic(0.5f, 1);
}

Specifically, in-game - what works and what doesn't work?