Multiple Developer Products in a place Error?[unanswered]

Hey, ok so, i have a surface Gui and on that surface Gui i have three textbuttons each with the same script witch is here below

local MarketplaceService = game:GetService("MarketplaceService")
local productId = 21992025


MarketplaceService.ProcessReceipt = function(receiptInfo) 


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



            if receiptInfo.ProductId == productId then


 script.Parent.Parent.Parent.Parent.Parent.Worker_View.SurfaceGui.accept.Visible = true        script.Parent.Parent.Parent.Parent.Parent.Worker_View.SurfaceGui.Frame.Frame.pick.Visible=false

wait(3)
script.Parent.Parent.Parent.Parent.Parent.Worker_View.SurfaceGui.accept.Visible = false
script.Parent.Parent.Parent.Parent.Parent.Worker_View.SurfaceGui.Frame.Frame.pick.Visible =true
pwait.Visible = true
click1.Visible = false
click2.Visible = false
click3.Visible = false
pay1.Visible = false
pay2.Visible = false
pay3.Visible = false
cancel.Visible = false
wclick1.Visible = true
wclick2.Visible = true
wclick3.Visible = true
ccancel.Visible = false

            end
        end
    end 




    return Enum.ProductPurchaseDecision.PurchaseGranted     
end

**and in the Starterpack i have this local script **

local buyButton = game.Workspace.ComputerMechanics1.Customer_View.SurfaceGui.Frame.Pay1
local productId = 21992025


buyButton.MouseButton1Click:connect(function()
    game:GetService("MarketplaceService"):PromptProductPurchase(game.Players.LocalPlayer, productId)
end)






local buyButton = game.Workspace.ComputerMechanics1.Customer_View.SurfaceGui.Frame.Pay2
local productId = 21992101


buyButton.MouseButton1Click:connect(function()
    game:GetService("MarketplaceService"):PromptProductPurchase(game.Players.LocalPlayer, productId)
end)





local buyButton = game.Workspace.ComputerMechanics1.Customer_View.SurfaceGui.Frame.Pay3
local productId = 21992105


buyButton.MouseButton1Click:connect(function()
    game:GetService("MarketplaceService"):PromptProductPurchase(game.Players.LocalPlayer, productId)
end)

the problem is when someone click the first gui it prompts the developer product for them to buy and when they buy it nothing happens, same with the third gui. but when some one buys the second gui it does what i want it to do. The only error i get when i go to play the game and i go to the developer console and after i bought the developer product is RbxUtility.DecodeJSON is deprecated, please use Game:GetService("HttpService"):JSONDecode() instead

Thank you.