Cannot make a TextLabel Invisible/Visible. Can you help? [closed]

local b = script.Parent

local a = true


b.MouseButton1Down:Connect(function()

    b.Position = UDim2.new(0.009, 0,0.446, 0)
end)

b.MouseButton1Up:Connect(function()

    b.Position = UDim2.new(0.009, 0,0.429, 0)
    script.Parent.Sound:Play()



end)

b.MouseEnter:Connect(function()
    b.ImageColor3 = Color3.new(1, 0.215686, 0.215686)
    game.StarterGui.PurchaseGUI.ImageLabel["13433400"].TextLabel.Visible = true
end)

b.MouseLeave:Connect(function()
    b.ImageColor3 = Color3.new(1, 0, 0)
    game.StarterGui.PurchaseGUI.ImageLabel["13433400"].TextLabel.Visible = false
end)