Npc Problem

[TomCrusher]

Hello, i got problems with this npc, hes not selling potions with backpacks, no idea why :/

local keywordHandler = KeywordHandler:new()
local npcHandler = NpcHandler:new(keywordHandler)
NpcSystem.parseParameters(npcHandler)
local talkState = {}

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({'spellbook'}, 2175, 150, 'spellbook')


shopModule:addBuyableItem({'blank'}, 2260, 10, 1, 'blank rune')
shopModule:addBuyableItem({'stalagmite'}, 2292, 120, 10, 'stalagmite rune')
shopModule:addBuyableItem({'poison wall'}, 2289, 210, 4, 'poison wall rune')
shopModule:addBuyableItem({'poison field'}, 2285, 65, 3, 'poison field rune')
shopModule:addBuyableItem({'fire wall'}, 2303, 245, 4, 'fire wall rune')
shopModule:addBuyableItem({'fire field'}, 2301, 85, 3, 'fire field rune')
shopModule:addBuyableItem({'fire bomb'}, 2305, 235, 2, 'fire bomb rune')
shopModule:addBuyableItem({'energy wall'}, 2279, 340, 4, 'energy wall rune')
shopModule:addBuyableItem({'energy field'}, 2277, 115, 3, 'energy field rune')
shopModule:addBuyableItem({'blank'}, 2260, 10, 1, 'blank rune')
shopModule:addBuyableItem({'avalanche'}, 2274, 180, 4, 'avalanche rune')
shopModule:addBuyableItem({'antidote'}, 2266, 65, 1, 'antidote rune')
shopModule:addBuyableItem({'instense healing'}, 2265, 95, 1, 'intense healing rune')
shopModule:addBuyableItem({'ultimate healing'}, 2273, 175, 1, 'ultimate healing rune')
shopModule:addBuyableItem({'destroy field'}, 2261, 45, 3, 'destroy field rune')
shopModule:addBuyableItem({'light magic missile'}, 2287, 40, 10, 'light magic missile rune')
shopModule:addBuyableItem({'heavy magic missile'}, 2311, 120, 10, 'heavy magic missile rune')
shopModule:addBuyableItem({'great fireball'}, 2304, 180, 4, 'great fireball rune')
shopModule:addBuyableItem({'explosion'}, 2313, 190, 6, 'explosion rune')
shopModule:addBuyableItem({'sudden death'}, 2268, 325, 3, 'sudden death rune')
shopModule:addBuyableItem({'convince creature'}, 2290, 80, 1, 'convince creature rune')
shopModule:addBuyableItem({'chameleon'}, 2291, 210, 1, 'chameleon rune')



shopModule:addBuyableItem({'Great Health Potion', 'Great Health Potion'}, 7591, 190, 'Great Health Potion')
shopModule:addBuyableItem({'great mana potion', 'great mana potion'}, 7590, 120, 'great mana potion')
shopModule:addBuyableItem({'great spirit potion', 'great spirit potion'}, 8472, 190, 'great spirit potion')
shopModule:addBuyableItem({'health potion', 'health potion'}, 7618, 45, 'health potion')
shopModule:addBuyableItem({'mana potion', 'mana potion'}, 7620, 50, 'mana potion')
shopModule:addBuyableItem({'strong health potion', 'strong health potion'}, 7588, 100, 'strong health potion')
shopModule:addBuyableItem({'strong mana potion', 'strong mana potion'}, 7589, 80, 'strong mana potion')
shopModule:addBuyableItem({'ultimate health potion', 'ultimate health potion'}, 8473, 310, 'ultimate health potion')

shopModule:addBuyableItem({'wand of vortex', 'vortex'}, 2190, 500, 'wand of vortex')
shopModule:addBuyableItem({'wand of dragonbreath', 'dragonbreath'}, 2191, 1000, 'wand of dragonbreath')
shopModule:addBuyableItem({'wand of decay', 'decay'}, 2188, 5000, 'wand of decay')
shopModule:addBuyableItem({'wand of cosmic energy', 'cosmic energy'}, 2189, 10000, 'wand of cosmic energy')

shopModule:addBuyableItem({'snakebite rod', 'snakebite'}, 2182, 500, 'snakebite rod')
shopModule:addBuyableItem({'moonlight rod', 'moonlight'}, 2186, 1000, 'moonlight rod')
shopModule:addBuyableItem({'necrotic rod', 'necrotic'}, 2185, 5000, 'necrotic rod')
shopModule:addBuyableItem({'terra rod', 'terra'}, 2181, 10000, 'terra rod')

function creatureSayCallback(cid, type, msg)
	if(not npcHandler:isFocused(cid)) then
		return false
	end
	end

	

npcHandler:setCallback(CALLBACK_MESSAGE_DEFAULT, creatureSayCallback)
npcHandler:addModule(FocusModule:new())

 

[Cykotitan]

Because you're using TFS 0.2