[newbie] Simple script problem :S

[nkmol]

i made a script for a key to open a door. the door is called mansion_2 en the key is called Key_1

Script :

void Onstart()
{
AddUseItemCallback("", "Key_1", "mansion_2", "UsedKeyDoor", true);
}

void UsedKeyDoor()
{
SetSwingDoorLocked("mansion_2", false, true);
PlaySoundAtEntity("", "unlock_door", "mansion_2", 0, false);
RemoveItem("Key_1");
}