Why doesn't my Title Screen Script work anymore?

I made a Title Screen and it used to work. How come it doesn't work anymore? This is my code:

wait(0.25)
local Screen = script:WaitForChild('TitleScreenGui')
local screen = Screen:Clone()
local play = screen.TitleScreenBox.TitleText.PlayButton

game.Players.playerAdded:connect(function(player)
    local startergui = player:WaitForChild('PlayerGui')
    screen.Parent = startergui
    screen.Enabled = true
end)

play.MouseButton1Down:connect(function(player)
    screen:Destroy()
end)

Any suggestions would be appreciated!