You know how to use phpmyadmin?
What entries are in your usergroups table of Photopost?
basically when we import the wowbb usergroups we check for admin_rights = 3 in the wowbb table and assign admin permissions to that group
if ( $cancontrol == 3 ) $cpaccess = 1;
Link me a shot of your usergroup entries or PM me access to phpmyadmin to see whats going on and your admin login