Are you passing Page Rank first off and if you are which home page are you passing it to?

 Sharing Page Rank with Yourself

How to know if you are passing page rank? Well, if you are link building and the links are pointing to http://website.com and http://www.website.com you most like are sharing page rank between the two. If so... you are losing out on improving search engine ranking.

In most search engine optimization companies, you can do a test to see if they are using URL rewrites by typing in there URL with the "www" and without the "www". If you type in with out the "www" does it go to the url with the "www". Well, it should or at least go to one unversal domain, not one of the other.

How to improve search engine ranking with URL Rewrite 

To do this is to use the .Htaccess file in your Unix server. If you have a linux server you can use this technique. It is very useful and beneficial. To get the script on how to improve search engine ranking simple follow the URL Code.