hi im trying to use .htaccess to remove www from my website. with this function.

RewriteEngine On
RewriteCond %{HTTP_HOST} ^www.brainhackers.kickuass.com$ [NC]
RewriteRule ^(.*)$ http://brainhackers.kickuass.com/$1 [R=301,L]

it doesnt seem to work.

edit: i cant even use .htaccess to make a custom 404 page.