You note in your original reply you where using pros registration not vb
's so that is what told me it was not installed correctly
Therefore to have a successful pro and vbgallery to pro import you must install pro to successfully integrate with vbulletin and you will know if its functional as there are tons of examples even one on this site. After that you want to do the import. you might want to make sure to clear your pro database tables and start fresh.