#1 - PRs update every 3-6 months. It may take a while if this is a new site.

#2 - PR is based (mostly) on incoming links and the linking structure within your website.

Problem 1: Google doesn't any incoming links to your site. That doesn't mean you don't have any, but it often means you don't have enough.

Problem 2: You don't ever link to your own homepage, so your page never receives any PR from within your website. Your "home" link points to...
http://traderbillonline.com/index.ph...tpage&Itemid=1
...when it should be...
http://traderbillonline.com/

Problem 3: You do not enforce a unique domain and your website can be access via http://www.traderbillonline.com/ OR http://traderbillonline.com/ which can lead to PR leakage.

Having said all that, PR is just a number that will come naturally with time and good rankings. You can't fast forward time, but you can work at improving your rankings.