I would like to inform you that when you proceed for payment you will have to login to your account, click on my shopping cart then you will be able to see all your winning items (kept in your shopping cart for up to 4 days).
Click on “CHECKOUT” button and then you will have to fill in all the information, such as shipping address, billing address and your contact no#. If all these information have been filled correctly then you will be able to pay for the items you want.
Another reason is that the items have been taken away from your shopping cart due to no payment received for one week.
For further information, you may consider checking with following link for reference: