Hi reginadp,
Since you are receiving the "The following items were unable to post did not pass validation need to be edited before posting" error when trying to post your listings, it is most likely that they are missing certain required fields, however, we would need to review the specific listings that exhibit this problem to know for sure.
Please file a support request using the appropriate link on our help page, http://www.auctiva.com/free-auction-software-help/help.aspx, and our customer support team will be happy to assit you!
-Mike