check out that link.... Make sure that you have your camera set to the smaller pictures the site tells you the max size you can upload..... many people miss this link above the upload area that tells you the specs.
If you still have trouble let me know or email me the picture at [email protected] and I can try it for you and let you know what the problem is or give you step by step instructions.
i also realised that there is a last step to perform. I kept forgetting 'Process" at the bottom of the page that actually sends the photos to teh server. Maybe you were missing that too?