Product still showing out of stock

Question

Previously in my Magento store, I had set the Qty for Item's Status to Become Out of Stock in the inventory to 5 under system->configuration->catalog->inventory so that if the quantity of the products reaches to 5 or below it should show as out of stock and it was working properly. Now I want the quantity to be displayed according to the exact number and hence I changed the value of Qty for Item's Status to Become Out of Stock from 5 to 0. But even after changing the products are still showing out of stock when the count reaches 5. I have reindexed all the data and I have even cleared the cache after changing the value. Kindly let me know what should I do to enable the products to show in stock even if the count reaches 5 or below.