OK since that was the problem, you'll have to go into ebay and revise your listing to add it. Just checking it off won't work now since the auction is already running. I'm gonna go try to find the instructions on how to do that, be right back........
Ok here it is, hope you can figure it out, just be sure to preview in Ebay before you save your changes.
1) Log in to Auctiva and click the "Images" tab.
2) Check the box next to the image you'd like to replace in your active listing and click the "Replace" button.
3) Select or upload an image to replace the checked image. This new image will assume the same URL as the one it replaced and be visible in your listing.