Amnesia Scripting Help!

[lawerancerivera]

I'm having trouble in the scripting for amnesia. I have an orbpiece and a stone chipper that I want to combine in the inventory to make a stone hammer. Im using the addcombinecallback but I'm not sure what the internal names are for the orbpiece and the stone chipper.

void OnStart()
{
AddCombineCallback("", "stone_chipper", "orbpiece_crimson", "awesome", true);
}

void awesome(string &in asItemA, string &in asItemB)
{
GiveItemFromFile("stonehammer", "stone_hammer.ent");
}

What am I doing wrong?