Hi Rythmic Doll,
If you are receiving an API error stating that you need to update your eBay account to a seller's account including placing a credit card on file for the automatic monthly billing of your eBay seller fees, it most likely means that you do not have a credit card on file with eBay or that the credit card you have on file has expired.
These API errors are actually being returned by eBay so our system is just passing the error message eBay returned along to you. If you believe you have met all the conditions described in the error and therefore believe you are receiving the error message in error, I recommend contacting eBay's customer support group to see if they can figure out why that error is being returned in response to the listing you try to post through Auctiva.
If any of you have any additional questions or concerns regarding your Auctiva account, please feel free to contact our customer support team by completing the web form on the following page of our site: http://www.auctiva.com/help/requesthelp.aspx
-Mike