error occure

[Futurewalker]

Message: Interface\AddOns\CustomChat\CustomChat.lua:377: attempt to index global 'CustomChat' (a nil value)
Time: 07/04/10 03:29:22
Count: 1
Stack: [C]: ?
Interface\AddOns\CustomChat\CustomChat.lua:377: in function `AddMessage'
...terface\AddOns\MozzFullWorldMap\MozzFullWorldMap.lua:900: in function `MozzFullWorldMapFrame_OnEvent'
[string "*:OnEvent"]:1: in function <[string "*:OnEvent"]:1>

Locals: mapFileName = nil
errataTable = nil
i = nil
oinfo = nil
oinfo_uncombine = <function> defined @Interface\AddOns\MozzFullWorldMap\MozzFullWorldMap.lua:455