Hi AmyK, I’m not certain what the problem is. Are you able to preview the collage on your computer before uploading it to the blog? Make sure the file has a name ending in .jpg – that could be the problem. Any further details you can give me such as the error message you’re getting? Thanks.
Sounds like an issue with the blog’s uploader. It may be Flash and if so updating Flash could help. Otherwise try contacting their customer support who may be able to help, as it’s unlikely that it’s to do with the image. You could also try updating your browser.