I m facing a diff type of problem I had created an account on my server .When I browse the site without www (i.e http://abc.com) it is running perfectly and fetching all pages from my server. But when i browse the site with www( i.e http://www.abc.com) then it try to fetch all the pages from any unknown server and shows error " page can not be found". I had checked all the entry of DNS these are perfect , I couldn't understand the problem.
Can any body help me ?????????????????????

If you are using Apache you need to put an entry in your httpd.conf under the <VirtualHost ... > container
ServerAlias www.yourdomain.com

If you are useing MS IIS 5.0, all you have to do is add the 2nd host hedder in the site property (ex, www.domainX.com) where you already have "domainX.com" and add a "www" host/alias in the DNS entery so it knows where to look, if you have not already done so...