how to make fully functional ShoppingMall

having problems on my shopping mall.
i add all the code to the new items, they show on cq_goods, cq_itemtype, added to itemtype.dat and shop.dat.
but when i buy them nothing happend beside letting me chose from eps or pp, but wont buy the item :(

any help?

make sure the following:

cq_itemtype.price/emoney > 0
itemtype.price/emoney > 0
cq_items[userID].Count < 40 for position 50 (meaning you have less than 40 items in your posession, do not trust what the client says)
cq_goods.ownerid == shop.dat.ownerID
shop.dat is valid

if you're hex editing you could reduce chances of errors by using my shop editor application? (found in my signature)