fatal error! HELP

[The chaser]

HI EVERYONE! I´m having a proplem with my amnesia custom story..
when im trying to go trought my level door in my level 2 to 3 it just says
FATAL ERROR
EXECUTE STRING (1,9) : EXPECTED ')'


////////////////////////////
//Run first time starting map
void OnStart()
{

}

////////////////////////////
//Run when entering map
void OnEnter()
{
AddUseItemCallback("", "key_1", "mansion_1", "UsedKeyOnLocked", true);
}

void UsedKeyOnLocked(string &in asItem, string &in asEntity)
{
SetSwingDoorLocked("mansion_1", false, true);
PlaySoundAtEntity("", "unlock_door.snt", "mansion_1", 0, false);
RemoveItem("key_1");
}

////////////////////////////
//Run when leaving map
void OnLeave()
{
AutoSave();
}



IF YOU CAN FIND THE MISTAKE IT WOULD HELP ME A LOT!

Try this script, maybe it works.