Problem on check item on position

[valivan601]

i use this to check if if there is a item in this position if has the item will be removed

but dont work anyone know whats could be?

removals = {
        { item = 9486, pos = { x = 33303 , y = 31491 , z = 7 } },
        { item = 9486, pos = { x = 33304 , y = 31491 , z = 7 } },	
        { item = 9486, pos = { x = 33305 , y = 31491 , z = 7 } },
	{ item = 9486, pos = { x = 33306 , y = 31491 , z = 7 } },  
	{ item = 9486, pos = { x = 33307 , y = 31491 , z = 7 } },
        { item = 9486, pos = { x = 33308 , y = 31491 , z = 7 } }, 
	{ item = 9486, pos = { x = 33309 , y = 31491 , z = 7 } }
         
    }

function onThink(interval, lastExecution, thinkInterval)
if getThingfromPos({x=33305, y=31491, z=7, stackpos=1}).itemid == 9486 then
		for i = 1, #removals do			
			removals[i].pos.stackpos = 1 						        		 
            		doRemoveItem(getThingfromPos(removals[i].pos).uid, 1)
        	end
        end
    return TRUE
end