Have you set the proper vb3license number in the photopost config-inc.php not customer number?
In phpmyadmin settings table entry number 172 for the cookie prefix is it set to bb which is the default vb
cookie prefix? Your cookie prefix in vb
is specified in the config file for vb
and if you did not change it then it would be bb and photopost cookie settings and vblicense number need to match VB
Thats the two most common mistakes people make