Can my board's registration form work across platforms & be used for my main site too

[newdude]

My site has 2 parts: the main site side and the forum/discussion board side (i.e. VBulletin board side). My main site has a registration form along w/password recovery separate from that used for Vbulletin. But, since installing Vbulletin, a username & password created in the forum is not valid in the main side of the site, and vice versa. If one registers a username & password from VBulletin, that username and p/w are useless in the main side of the site. So, in order to participate in both parts of the site, users must complete 2 separate registrations. And, if they forget their p/word or username from the main part of the site, there's no way for users to recover them. I cannot link into Vbulletin's p/word recovery script to help users recover the lost p/words used in the main part of the site.

Also, my site originally used PHPBB for the forum. When using PHPBB the registrations and the p/word recovery worked across both platforms, and p/word recovery was handled by PHPBB's p/w recovery script. In fact, the members list in PHPBB would even include members who only participated in the main site and never participated in the forum. The member list in phpbb was working in conjunction with the memberlist in my main part of my site too.

How can I get VBulletin to work the same way? I can't require users to perform 2 separate registrations on each part of the site. Can someone please help?

I had contacted VBulletin immediately after installation about this, and they directed me to VBadvanced as the only way to do this. So, I purchased VBadvanced, installed it, and then VBadvanced support said VBadvanced is not setup to do this. My site is www.robeprobe.com