Ошибка LUA сркипта

-- tenlines.lua

-- By Tyrone, on 17/04/07
-- Tells a user when they log in what the last 10 chat messages were

LastTenMessages = {}
NumberOfMessages = 10

_, botname = VH:GetConfig("config", "hub_security")

function VH_OnParsedMsgChat(nick, data)

if (string.find(data, "^[%.%+!]")) then
-- we start with a command
else
nowdate = os.date("%X")
AddMessage("["..nowdate.."] <"..nick..">"..data..string.format("\n"))
end

return 1
end

function AddMessage(message)
if (NumberOfMessages == 0) then
LastTenMessages[1] = message
NumberOfMessages = 1
elseif (NumberOfMessages < 20) then
NumberOfMessages = NumberOfMessages + 1
LastTenMessages[NumberOfMessages] = message
elseif (NumberOfMessages == 20) then
for i = 1, 19, 1 do
LastTenMessages = LastTenMessages[i+1]
end
LastTenMessages[20] = message
end
end

function GetMessages()
if (NumberOfMessages == 0) then
return ""
else
TempString = ""
for i = 1, NumberOfMessages, 1 do
TempString = TempString.." "..LastTenMessages -- fixd
end
return TempString
end
end

function VH_OnUserLogin(nick)
SendMessageToUser(string.format("Последние 20 сообщений:\n")..GetMessages(), nick, botname)
return 1
end

function SendMessageToUser(data, nick, from)
result, err = VH:SendDataToUser("<"..from.."> "..data.."|", nick)
return 1
end