Lua A quest mission script

[sick]

I'm creating a new quest and I'm stuck at one script:
When i use pick on these stones i get 1 small stone, but that works just once, if you try to get a second small stone it says something like - You have already done this.

If anyone could make this script I would be very glad The id of pick: 2553 and stones: 9421.
Thanks in advance

 

[Cykotitan]

local storage = 8192

function onUse(cid, item,  fromPosition, itemEx, toPosition)
	if itemEx.itemid == 9421 then
		if getPlayerStorageValue(cid, storage) == -1 then
			doPlayerAddItem(cid, 1294, 1)
			doSendMagicEffect(toPosition, CONST_ME_BLOCKHIT)
			setPlayerStorageValue(cid, storage, 1)
		else
			doPlayerSendCancel(cid, 'You have already done this.')
		end
		return true
	end
end

combined with normal pick.lua:

local storage = 8192

function onUse(cid, item, fromPosition, itemEx, toPosition)
	if((itemEx.uid <= 65535 or itemEx.actionid > 0) and isInArray({354, 355}, itemEx.itemid)) then
		doTransformItem(itemEx.uid, 392)
		doDecayItem(itemEx.uid)
		doSendMagicEffect(toPosition, CONST_ME_POFF)
		return true
	end

	if(itemEx.itemid == 7200) then
		doTransformItem(itemEx.uid, 7236)
		doSendMagicEffect(toPosition, CONST_ME_BLOCKHIT)
		return true
	end

	if(itemEx.itemid == 9421) then
		if(getPlayerStorageValue(cid, storage) == -1) then
			doPlayerAddItem(cid, 1294, 1)
			doSendMagicEffect(toPosition, CONST_ME_BLOCKHIT)
			setPlayerStorageValue(cid, storage, 1)
		else
			doPlayerSendCancel(cid, 'You have already done this.')
		end
		return true
	end

	return false
end

 

[sick]

Yeah, that works when using pick on the stone, however when i just use the stone with my mouse i also get small stone :S

 

[sick]

Fixed it already, thanks for your help