When you view your Photos table is it empty?
hense why I asked if you tried to install it again and had two different databases and maybe you changed the prefix to another install that has no photos loaded.
Basically the program is reporting the photos and comments tables are empty.
If you have backups there a way to get them back but thats only if you have a mysql backup
PM me an admin login and link to phpmyadmin so I can see your mysql tables