Why won't it let me use script.parent? WTF

If i use game.Workspace it works but when I regen another, the siren doesn't play because there's two of the same models because they were cloned!

This is literally all it is:

function onClicked(GUI)

	 script.Parent.Parent.Parent.Parent.Parent.Parent.EngineBlock.Sound:Play()

end

script.Parent.MouseButton1Click:connect(onClicked)