Hi Jax,
We aren't experiencing any technical problems that would account for this behavior, so I'm uncertain what the cause of this problem may be. I've heard that the use of the new eBay Desktop can interfere with the ability to upload through Auctiva so, if you're using that application, it may be the source of your troubles.
In any event, if you are still experiencing this problem, please file a support request using the appropriate link on our help page:
http://www.auctiva.com/free-auction-software-help/help.aspx-Mike