[Scripting Question] Need help with Sootsack

[D33pFrO57]

Hello
I would to show how many ash is in the sootsack like the coincase does with coins. how exactly should i do that?

ItemHandlers::UseInField.add(:COINCASE,proc{|item|
Kernel.pbMessage(_INTL("Münzen: {1}",pbCommaNumber($PokemonGlobal.coins)))
next 1

I've tested to replace this with sootsack and edited the PBitem to make sootsacke usesable but when i walk over the gras with teraintag 14 and check i got 0 and it does not increase :/.

Here the edited entry

ItemHandlers::UseInField.add(:SOOTSACK,proc{|item|
Kernel.pbMessage(_INTL("Asche: {1}",pbCommaNumber($PokemonGlobal.sootsack )))
next 1

I've changed the tileset could that be the problem? but edited terain tag for the tile to 14