Ebay Photos

I have just received my Macbook Pro.
I have an online Ebay store and everytime I go to upload my photos on Ebay it will find the picture, upload it, and then on Ebay , it says "uploaded successfully " but the picture is not showing up in Ebay? I have no idea what is going on. I have spent 3 hours on this and I am hoping someone can please walk me through this!

Thank you in advance!

If I try it on my old Dell computer, it uploads successfully, then shows up on Ebay, So I know it has nothing to do with Ebay, which was my first thought!

Maybe your trying to upload the photos out of your iPhoto Library. Export the photos from iPhoto to a folder on your Desktop (for expample), then have eBay upload them from there. Be sure that you're exporting them as jpg files.