Hey bud, I appreciate what you're trying to do with your site, but.. I've got some concerns.

Your first mistake was using vBulletin 4, although it's the most up-to-date vBulletin script, it's not the most user-friendly nor the most intriguing, nor is it fully optimized.

Your background is 1.61 MB, which slows down the speed of the site, and it's a pretty simple background, too.

The main reason that you should come to vNulletin is that we are unlike other sites of our kind (e.g. ForumScriptz) who privatize themselves and limit access to their forums. We are open to everybody and we offer most of our available services 100% free!
Your sections are private to guests, so not sure what you mean by 'we are unlike other sites of our kind (e.g. ForumScriptz) who privatize themselves and limit access to their forums.'

Aren't you doing the same?

Your site looks like the original vBulletin, just with a few color changes.
Be unique, start out strong, with a custom skin, something.

The problem most people have with their sites is they want to release things before they're even finished.
Take your time, fix your forum up, it could have potential.