помгите

[Gohar]

Постоянно стала выскакивать ошибка lua непойму что не так ..

Message: Interface\AddOns\BasicChatMods\buttons.lua:7: attempt to index local 'u' (a nil value)
Time: 11/29/15 11:39:47
Count: 1
Stack: Interface\AddOns\BasicChatMods\buttons.lua:7: in main chunk

Locals: dummy = <function> defined @Interface\AddOns\BasicChatMods\buttons.lua:1
(for index) = 1
(for limit) = 7
(for step) = 1
i = 1
u = nil
(*temporary) = "ChatFrame1UpButton"
(*temporary) = nil
(*temporary) = "UpButton"
(*temporary) = nil
(*temporary) = nil
(*temporary) = "attempt to index local 'u' (a nil value)"

сам код выглядит так..

local dummy = function() end

ChatFrameMenuButton:Hide()                          -- Menu button

for i = 1, 7 do
    local u = _G["ChatFrame"..i.."UpButton"]        -- Scroll Up button
    u:Hide()                                        -- Delete these 2 lines if you don't want to hide this button
    u.Show = dummy                                  -- Delete these 2 lines if you don't want to hide this button
    local d = _G["ChatFrame"..i.."DownButton"]      -- Scroll Down button
    d:Hide()
    d.Show = dummy
    local b = _G["ChatFrame"..i.."BottomButton"]    -- Scroll to bottom button
    b:Hide()
    b.Show = dummy
end

до этого её не было..
p.s. черт название темы не отредактировать , очепятка..