Почему не работает скрипт на Lua?

function ButtonOpenGate()
    local MyFrame = BlzGetOriginFrame(ORIGIN_FRAME_GAME_UI, 0)
    local MyButton = BlzCreateFrame('ReplayButton', MyFrame, 0, 0)

    BlzFrameSetSize(MyButton, 0.3, 0.042)
    BlzFrameSetPoint(MyButton, FRAMEPOINT_CENTER, MyFrame, FRAMEPOINT_RIGHT, 0, 0.255)
    BlzFrameSetText(MyButton, 'Открыть/закрыть западные ворота')
	udg_Button[0] = MyButton
    local i = 1
    local ClickTrigger = CreateTrigger()
    function OnClick()
        if i == 1 then
            print('Да')
            i = 0 
            ModifyGateBJ( bj_GATEOPERATION_OPEN, gg_dest_YTce_2842 )
        else
            print('Нет')
            i = 1
            ModifyGateBJ( bj_GATEOPERATION_CLOSE, gg_dest_YTce_2842 )
        end       
    end

    TriggerAddAction(ClickTrigger, OnClick)
    
    BlzTriggerRegisterFrameEvent(ClickTrigger, MyButton, FRAMEEVENT_CONTROL_CLICK)
end