Try with this and post what print on your console
local cfg ={
mounts = {1,2,3,4,5,6,7,8,9,10,11,12,13,14,15,16,17,18,19,20,21,22,23,24,25,26,27,28,29,30,31,32,33,34,35,36,37,38,39,40,41,42},
storage = 13540
}
function onUse(cid, item, fromPosition, itemEx, toPosition)
local player =...