help with dd quest?

[Rhydin]

So, I'm creating a desert dungeon like quest for my ot, using 0.3.6pl1.

When I try to pull the switch to teleport us to the reward room it just gives me this error:

[21/11/2011 19:05:16] [Error - Action Interface] 
[21/11/2011 19:05:16] data/actions/scripts/quests/desert.lua:onUse
[21/11/2011 19:05:16] Description: 
[21/11/2011 19:05:16] data/actions/scripts/quests/desert.lua:52: attempt to compare table with number
[21/11/2011 19:05:16] stack traceback:
[21/11/2011 19:05:16] 	data/actions/scripts/quests/desert.lua:52: in function <data/actions/scripts/quests/desert.lua:39>

here's the lua file

local config = {
	-- level needed to make the quest
	level = 20,
	-- if players should be able to do the quest unlimited amount of times (not conflicting quest rewards)
	redo = {
		status = false, -- true = unlimited, false = once
		storageValue = 4535 -- only if status is false this will be used
	},
	-- vocation requirement, positions and item configuration
	{
		vocations = {1, 5}, -- sorc
		itemId = 2175,
		playerPos = {x=1351, y=834, z=8},
		newPos = {x=1347, y=810, z=8},
		itemPos = {x=1350, y=834, z=8}
	},
	{
		vocations = {2, 6}, -- cleric
		itemId = 2674,
		playerPos = {x=1355, y=837, z=8},
		newPos = {x=1347, y=810, z=8},
		itemPos = {x=1350, y=834, z=8}
	},
	{
		vocations = {3, 7}, -- paladin
		itemId = 2455,
		playerPos = {x=1359, y=834, z=8},
		newPos = {x=1347, y=810, z=8},
		itemPos = {x=1360, y=834, z=8}
	},
	{
		vocations = {4, 8}, -- knight
		itemId = 2376,
		playerPos = {x=1355, y=830, z=8},
		newPos = {x=1347, y=810, z=8},
		itemPos = {x=1355, y=829, z=8}
	}
}
function onUse(cid)
	local players = {}
	for _, v in ipairs(config) do
		local player = getTopCreature(v.playerPos).uid
		if isPlayer(player) == FALSE then
			return doPlayerSendCancel(cid, "There are not enough players.")
		elseif getPlayerLevel(player) < config.level then
			players.level = true
		elseif isInArray(v.vocations, getPlayerVocation(player)) == FALSE then
			players.vocation = true
		elseif config.redo.status and getPlayerStorageValue(cid, config.redo.storageValue) ~= TRUE then
			players.done = true
		else
			if getTileItemById(v.itemPos, v.itemId) < 1 then
				players.item = true
			else
				table.insert(players, player)
			end
		end
	end
	if players.level then
		doPlayerSendCancel(cid, "All players need to be level " .. config.level .. " or above.")
	elseif players.vocation then
		doPlayerSendCancel(cid, "All players must stand on the correct tiles.")
	elseif players.done then
		doPlayerSendCancel(cid, "A player in your team has already done this quest.")
	elseif players.item then
		doPlayerSendCancel(cid, "All items must be on the correct positions.")
	else
		for k, player in ipairs(players) do
			doSendMagicEffect(getCreaturePosition(player), CONST_ME_POFF)
			doTeleportThing(player, config[k].newPos)
			doSendMagicEffect(getCreaturePosition(player), CONST_ME_TELEPORT)
		end
	end
	return TRUE
end

How do I fix this? :\