so we've got a problem hueston?????

Gives player 100 cash when they buy the developer product. Why doesn't it work?

local MarketPlaceService = game:GetService("MarketplaceService")
local ProductId = 85734826 
local Cash = 100

MarketPlaceService.ProcessReceipt = function(receiptInfo)
    for i, player in ipairs (game.Players:GetChildren()) do
        if player.userId == receiptInfo.PlayerId then
            if receiptInfo.ProductId == ProductId then

                player.leaderstats.Money.Value = player.leaderstats.Money.Value + Cash
            end
        end
    end
    return Enum.ProductPurchaseDecision.PurchaseGranted
end