Lua Buy items From Npc (tibia 8.60-Tfs 0.4)

[Gaber Zen]

Hello Guy`s
When buy items from shop, have Erro?
but i can buy skin amulet, other items not, why?
Tfs 0.4
Tibia Clinet 8.60

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

local shopModule = ShopModule:new()
npcHandler:addModule(shopModule)

shopModule:addBuyableItem({'star amulet'}, 2131, 4000000, 'star amulet')
shopModule:addBuyableItem({'ruby necklace'}, 2133, 2000000, 'ruby necklace')
shopModule:addBuyableItem({'emerald bangle'}, 2127, 3500000,'emerald bangle')
shopModule:addBuyableItem({'stone skin amulet'}, 2197, 10000, 5,'stone skin amulet')

npcHandler:addModule(FocusModule:new())

 

[Mateus Robeerto]

try..

NPC XML.

<?xml version="1.0" encoding="UTF-8"?>
<npc name="Deruno" script="default.lua" walkinterval="2000" floorchange="0">
    <health now="100" max="100"/>
    <look type="132" head="20" body="39" legs="45" feet="7" addons="0"/>
    <parameters>
        <parameter key="module_shop" value="1"/>
        <parameter key="message_greet" value="Hello |PLAYERNAME|. Are you interested in something?"/>
        <parameter key="shop_buyable" value="star amulet,2131,4000000;ruby necklace,2133,2000000;emerald bangle,2127,3500000;stone skin amulet,2197,10000,5"/>
        
    </parameters>
</npc>

default.lua

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

npcHandler:addModule(FocusModule:new())