Script help (Key to door)

[QysteiN]

I created a script:
Anyone can spot whats wrong?

I get error whenever i try to load my custom story:

////////////////////////////
// Run first time starting map
void OnStart()
{
AddUseItemCallback(''awesomekey_1'', ''castle_1'', ''UsedKeyOnDoor'', True);
}
void UsedKeyOnDoor(string &in asItem, string &in asEntity)
{
SetSwingDoorLocked(''castle_1''' , false, true);
PlaySoundAtEntity('' '', ''unlock_door'' , ''castle_1'' , 0, false);
RemoveItem(''awesomekey_1'');
}

////////////////////////////
// Run when leaving map
void OnLeave()
{