Why won't my text button activate any code in play mode?

I've tried many things to get this to work. it works in test mode in studio and opens the rest of the GUI but when I run a server, it does nothing. This is the code I've used in the button. What have I done wrong?

script.Parent.MouseButton1Click:connect(function(Clicked) 
    script.Parent.Visible = false
    script.Parent.Parent.Size.Visible = true
    script.Parent.Parent.Jump.Visible = true
    script.Parent.Parent.Back.Visible = true
    script.Parent.Parent.Speed.Visible = true
    script.Parent.Parent.Customsize.Visible = true

end)