Key Not Being Removed From Inventory After Use

[The chaser]

Errr... nope.

It is:

void OnStart()
{

AddUseItemCallback("OpenDoor", "leveldoor1_key", "leveldoor1", "UnlockLevelDoor", true);
}

void UnlockLevelDoor (string &in asItem, string &in asEntity)
{
///Door stuff
RemoveItem("leveldoor1_key");
}

It would be certainly better if you posted the whole script but, by what I can see, that's the issue.