You did exactly as I stated. You installed classifieds into your old photopost database with the same table prefix.
Look at your gallery url you gave me. The page has errors and look at the footer that says Photopost classifieds not Photopost Pro.
This could only happen if you upgraded/installed into an already existing photopost database. Bet the table prefix in your config file is the one for your gallery as well.
By the way your classifieds is closed so I see nothing but one look at your gallery confirms what I stated in post 8