You must ensure that your photopost cookies path vbulletin like so
cookie path /
cookie prefix bb
cookie domain .urbanchocolate.com
This must be the same in
vb and photopost and the correct
vb license number must exist in the config-inc.php file $vblicense line.
You might want to reinstall to specify the correct cookie prefix and
vb license number otherwise you need to edit the config-inc.php file and place the
vb license number not customer number and edit the settings table settings 171-173 directly using like phpmyadmin.