Combining Items Help

[Selyp]

Hey everyone. I know this has been asked before, but I cannot find a thread that will answer my questions. I am having trouble with a script for combining items. I have looked on the wiki at scripts, but my script is still not working, so I'm not sure whats wrong. Here is my inventory.hps file.

void OnStart()
{
AddCombineCallback("", "Vinegar", "PhosphoricAcid", "CombineFunc", true);
}
void CombineFunc (string &in asItemA, string& asItemB)
{
GiveSanityBoost();
RemoveItem("Vinegar");
RemoveItem("PhosphoricAcid");
GiveItem("bucket_of_tar", "Puzzle", "bucket_of_tar", "bucket_of_tar.tga", 0);
}

i have made sure that all of my items are the correct name, and the game doesn't crash when I enter, so I am assuming the script file itself is okay, I'm just not sure why the items won't combine. Any help would be greatly appreciated.

-Selyp