I am confused on Developer Products?

Please Help me with this I am confused?

-- Put the ID of the DevProduct in place of 19184765
local bloxyColaId = 19184765

-- When a player clicks on the sphere, they will be asked if they wish to purchase the DevProduct
script.Parent.ClickDetector.MouseClick:connect(function(player)
	Game:GetService("MarketplaceService"):PromptProductPurchase(player, bloxyColaId)
end)
-- define function that will be called when purchase finished
MarketplaceService.ProcessReceipt = function(receiptInfo) 

	-- find the player based on the PlayerId in receiptInfo
	for i, player in ipairs(game.Players:GetChildren()) do
		end
	end
		if player.userId == receiptInfo.PlayerId then
			
			
			if receiptInfo.ProductId == productId then
				Player.leaderstats.Money.Value = Player.leaderstats.Money.Value + 100
				end
			end

This will not work I am trying to give a player 100 Money if bought the developer Product but when I click the brick it will not pop out a buy item note? Please Help me?

For ProcessReceipt to work correctly, you need to put the script in ServerScriptService.