As noted in previous discussion
Your
vb cookie prefix is set in your
vb config file. This is normally bb
Your
vb license number must be set in the photopost config-inc.php file properly. You can find your license number at the top of the
vb config file.
Your
vb cookies should be set to this to provide an integrated login
cookie prefix /
cookie domain .domain.com
Your photopost cookies should be set to this
cookie path /
cookie prefix bb
cookie domain .domain.com
If all of the above is set correctly you will not have login issues. In fact I fixed this for you last time and the login was completely integrated.