Whats wrong with my script?

[ZyLogicX]

I have it like this now but it says Expected identifier on 1, 25 what do I need to do?

AddUseItemCallback("" , "roomkey_1" , "door_to_outside" , "UsedKeyOnDoor" , true);

void UsedKeyOnDoor(string &in asItem, string &in asEntity)
{
SetSwingDoorLocked("door_to_outside" , false , true);
PlaySoundAtEntity("" , "unlock_door" , "door_to_outside" , 0, false);
RemoveItem("roomkey_1");
}

void OnEnter()
{
AddEntityCollideCallback("Player", "Intro_Quest_Area", "GetIntroQuest", true, 1);
AddEntityCollideCallback("Player", "Intro_Complete_Area", "FinishIntroQuest", true, 1);
}

void GetIntroQuest(string &in asParent, string &in asChild, int alState)
{
AddQuest("introquest", "IntroQuest");
}

void FinishIntroQuest(string &in asParent, string &in asChild, int alState)
{
CompleteQuest("introquest", "IntroQuest");
}