why does this script only works in the studio test mode?

It's placed inside a normal script and if I move it into a localscript it'll stop to work at all.

script.Parent.Dialog.DialogChoiceSelected:connect(function(player,choice)
	if choice.Name == "yes" and player.Character.Spawn.flo.Value == true then
		script.Parent.Dialog.one.yes.ResponseDialog = "I see, you go to the left then..."
		player.Character.Health.Disabled = true
		player.Character.Spawn.pass.Value = "left"
	wait()
	elseif choice.Name == "no" and player.Character.Spawn.flo.Value == true then
		script.Parent.Dialog.one.no.ResponseDialog = "Lies! go the room in the left now!"
		player.Character.Health.Disabled = true
		player.Character.Humanoid.Health = 50
		player.Character.Spawn.pass.Value = "left"
		wait()
	elseif choice.Name == "no" and player.Character.Spawn.flo.Value == false then
		script.Parent.Dialog.one.no.ResponseDialog = "Good, you may pass"
		player.Character.Spawn.pass.Value = "ahead"
		wait()
	elseif choice.Name == "yes" and player.Character.Spawn.flo.Value == false then
		script.Parent.Dialog.one.yes.ResponseDialog = "If you say so"
		player.Character.Spawn.pass.Value = "both"
		wait()
	end
end)