Button Works In Studio But Does Not Work In-Game, How Do I Fix? I Tried Different Ways

I Make a Button and Its Not Clickable In-Game But Clickable in Studio.

Script Right Now of Button/ What I Tried:

F1 = script.Parent.Parent.Parent.Characters
CF = script.Parent.Parent.Parent.Start

function Starters()
CF.Visible = false
F1.Visible = true
end
script.Parent.MouseButton1Down:connect(Starters)