Addon bug :S

[Thorn]

hi, look i have this lua addon npc

local keywordHandler = KeywordHandler:new() 
local npcHandler = NpcHandler:new(keywordHandler) 
NpcSystem.parseParameters(npcHandler) 
 
 
function onCreatureAppear(cid)            npcHandler:onCreatureAppear(cid) end 
function onCreatureDisappear(cid)        npcHandler:onCreatureDisappear(cid) end 
function onCreatureSay(cid, type, msg)    npcHandler:onCreatureSay(cid, type, msg) end 
function onThink()                        npcHandler:onThink() end 
 
 
function buyAddons(cid, message, keywords, parameters, node) 
    --TODO: buyAddons function in modules.lua 
    if(not npcHandler:isFocused(cid)) then 
        return false 
    end 
 
 
    local addon = parameters.addon 
    local cost = parameters.cost 
 
        if doPlayerRemoveMoney(cid, cost) == TRUE then 
            doPlayerAddAddons(cid, addon) 
            npcHandler:say('There, you are now able to use all addons!', cid) 
        else 
            npcHandler:say('Sorry, you do not have enough money.', cid) 
        end 
 
 
    keywordHandler:moveUp(1) 
    return true 
end 
 
 
local node1 = keywordHandler:addKeyword({'first addon'}, StdModule.say, {npcHandler = npcHandler, onlyFocus = true, text = 'Do you want to buy the first addons set for 250000 gold coins?'}) 
    node1:addChildKeyword({'yes'}, buyAddons, {addon = 1, cost = 2500000, premium = false}) 
    node1:addChildKeyword({'no'}, StdModule.say, {npcHandler = npcHandler, onlyFocus = true, moveup = 1, text = 'Too expensive, eh?'}) 
 
 
local node2 = keywordHandler:addKeyword({'second addon'}, StdModule.say, {npcHandler = npcHandler, onlyFocus = true, text = 'Would you like to buy the second addons set for 500000 gold coins?'}) 
    node2:addChildKeyword({'yes'}, buyAddons, {addon = 2, cost = 5000000, premium = false}) 
    node2:addChildKeyword({'no'}, StdModule.say, {npcHandler = npcHandler, onlyFocus = true, moveup = 1, text = 'Too expensive, eh?'}) 
 
 
keywordHandler:addKeyword({'addon'}, StdModule.say, {npcHandler = npcHandler, onlyFocus = true, text = 'I sell the first addons set for 25000 gold coins and the second addons set for 50000 gold coins.'}) 
 
 
npcHandler:addModule(FocusModule:new())

it works fine, but after i buy the first or second addons i try to change my putfit it gets bugged. Plz help :SS