Won't detect if a player is on xbox?

why won't this work?

local UserInputService = game:GetService("UserInputService")
local lastInput = UserInputService:GetLastInputType()

if UserInputService.GamepadEnabled and not UserInputService.KeyboardEnabled then 
    script.Parent.Enabled = true
end

and

local UserInputService = game:GetService("UserInputService")

UserInputService.InputBegan:Connect(function(input)
    if input.UserInputType == Enum.UserInputType.Gamepad1 then
        if input.KeyCode == Enum.KeyCode.ButtonA then
            script.Parent.Parent:Destroy()
        end
    end
end)

its suppose to check if the player is on xbox and if they are show the gui, and once they press a it destroys it

please help.