Fatal Error - Need Help

[Shiro]

Hello guys, I recently started creating a custom story and I'm doing a 2nd map, so the first one went great and now this second one is giving me a problem.

This is the problem:

FATAL ERROR: Could not load script file 'custom stories/Death's Touch/maps/C:/Program Files/Steam/steammaps/common/Amnesia The Dark Descent/custom stories/Death's Touch/maps/Map02/unknown2.hps'!
Execute String(1,1) : ERR: No matching signatures to 'OnLeave()'
main (14,1(: ERR: Unexpected end of file

And this is the .hps file:

void OnStart()
{
PlaySoundAtEntity("piano", "piano", "piano", 0, false);
AddEntityCollideCallback("Player", "pianostop", "pianostop", true, 1);
AddUseItemCallback("Level Key", keylevel", "level", "UseKeyOnDoor", true);
}

void UseKeyOnDoor(string &in asItem, string &in asEntity)
{
SetSwingDoorLocked("level", false, true);
PlaySoundAtEntity("", "unlock_door.snt", asEntity, 0, false);
RemoveItem(asItem);
}

Thanks for helping.