Why isnt my script working in the actual game?

game.Players.PlayerAdded:connect(function(plr)
    Screen = game.ServerStorage.ScreenGui:Clone()
    Screen.Parent = plr.PlayerGui

    plr.PlayerGui.ScreenGui.Frame.TextButton.MouseButton1Click:connect(function()
        a = plr.PlayerGui.ScreenGui.Frame.TextBox.Text
            for i, v in pairs(game.Workspace:GetChildren()) do
                print(a)
                if v.Name == a then
                    print("Q")
                    v.Transparency = 1 

                end
            end
        end)
    end)

It's a gui that you write in, let's say you write "Part" and press the go button, all the parts should go invisible. It works but only in studio and not the real game. Help?