Game does not recognize inventory.hps file

[LagerShan]

When trying to combine both items, the game does not seem to combine both items at all, nor give out a debug message.
I can post in the Code here and let me know what the problem is, thanks. I tried multiple ways to fix it but none worked so far.
And yeah, the items in game have the same name as what is put into the code. It does not combine the items whatsoever. Nothing functions. The file is also placed in the same folder of the map and hps file.

Code: (Select All)

void OnGameStart()
{
    AddCombineCallback("", "HammerPiece_1", "HammerPiece2_1", "GetFullHammer", true);
}

void GetFullHammer(string &in asItemA, string &in asItemB)
{
    GiveItem("Hammer", "stone_hammer.ent", "FullHammer", "stone_hammer.tga", 1);
    PlayGuiSound("make_hammer", 1);
    RemoveItem(asItemA);
    RemoveItem(asItemB);
}