Need Wordpress rewrite help please

Hello,

I want my blog URLs to appear with the www subdomain. Currently the URLs appear as *http://mydomain/blog* but I want *http://www.mydomain/blog*

I am using Wordpress 2.8.6 which produces an htaccess file like below.

# BEGIN WordPress
<IfModule mod_rewrite.c>
RewriteEngine On
RewriteBase /blog/
RewriteCond %{REQUEST_FILENAME} !-f
RewriteCond %{REQUEST_FILENAME} !-d
RewriteRule . /blog/index.php [L]
</IfModule>
# END WordPress


I found the code below that is suppose to accomplish this but my blog breaks when I add it the existing htaccess file.

Options +FollowSymlinks
RewriteEngine on
rewritecond %{http_host} ^mydomain.com [NC]


rewriterule ^(.*)$ http://www.mydomain.com/blog$1 [R=301,NC]

Thanks for any assistance.

 

I found the settings in the admin area. Thanks man!