Key to open door on seperate level

[drunkmonk]

ok so should it look something like this?
void OnStart()
{
AddUseItemCallback("", "Key_Upper_Levels", "Upper_Levels", "UsedKey", true);
}
void UsedKey(string &in item, string &in door)
{
SetLevelDoorLocked("Upper_Levels", false, true);
PlaySoundAtEntity("", "unlock_door", "Upper_Levels", 0,false);
RemoveItem("Key_Upper_Levels");
GiveSanityBoostSmall();
{