PRoblem with clean ;S

[wafuboe]

i have a problem with clean ;S
when i say clean or autocleaning..
the server freezes then kicks out all online players then when you try to logins says..
server is under mantenance, please reconect in a while
and its all i cant login cus its saying that and there no choice to restarting the exe ;

here the script..

local cleanEvent = 0

function onSay(cid, words, param, channel)
if(param == '') then
doPlayerSendTextMessage(cid, MESSAGE_STATUS_CONSOLE_BLUE, "Collected " .. doCleanMap() .. " items.")
return true
end

local t = string.explode(param, ",")
if(t[1] == 'tile') then
local removeLoaded = false
if(t[2]) then
removeLoaded = getBooleanFromString(t[2])
end

doCleanTile(getCreaturePosition(cid), removeLoaded)
return true
end

if(not tonumber(param)) then
doPlayerSendCancel(cid, "Command requires numeric param.")
return true
end

stopEvent(cleanEvent)
prepareClean(tonumber(param), cid)
return true
end

function prepareClean(minutes, cid)
if(minutes == 0) then
if(isPlayer(cid)) then
doPlayerSendTextMessage(cid, MESSAGE_STATUS_CONSOLE_BLUE, "Cleaned " .. doCleanMap() .. " items.")
end

doBroadcastMessage("Game map cleaned.")
elseif(minutes > 0) then
if(minutes == 1) then
doBroadcastMessage("Game map cleaning in " .. minutes .. " minute, please pick up all your items.")
else
doBroadcastMessage("Game map cleaning in " .. minutes .. " minutes.")
end

cleanEvent = addEvent(prepareClean, 60000, minutes - 1, cid)
end
end