Hi Shamira,
Welcome to Auctiva! The "Not Posted in Time" error can actually mean a few different things, so we'd need to take a look at your specific situation to diagnose why this error is being returned and figure out what you need to do to post these listings successfully.
Please contact our customer support team by completing the web form on the following page, and we'll be happy to help you out with this: http://www.auctiva.com/free-auction-software-help/help.aspx
-Mike