Are you on a windows server?
You can remove this from index.php as your error reporting is set too high
Code:
Content visible to verified customers only.
Interesting your not getting the server error about domain anymore.
Okay well I would suggest you edit the settings table directly in Photopost database and update the settings to the proper domain name and set setting 41 to vb3 as I take it thats the one you want to integrate with not vb2
If you need assistance send me ftp and database access and I can assist