Missing Images in New Guestbook

I'm in the process of moving a guestbook (2.2) over to a new server, which is running 2.3.1. I uploaded the database from the old server, and the posts are showing up fine, but none of the images are.

However, any image that I upload in the guestbook on the new server show up fine.

What do I have to do to get the old photos to show? I assume it's a path problem, but since the newly uploaded photos show fine, I'm not sure what to change.

Thanks for your help.

BASE_URL IN ADMIN/CONFIG.INC.PHP