mod_rewrite problem

Hi, the following code redirects www.usersite.mysite.biz to www.mysite.biz/users/sites/usersite the problem is when the 'www' is left out it doesn't work. could someone help me to fix this? many thanks RewriteEngine on RewriteCond %{HTTP_HOST} ^www\.[^.]+\.mysite\.biz$ RewriteRule ^(.+) %{HTTP_HOST}$1 [C] RewriteRule ^www\.([^.]+)\.mysite\.biz(.*) http://www.mysite.biz/users/sites/$1 RewriteCond %{HTTP_HOST} ^www\.[^.]+\.mysite\.ie$ RewriteRule ^(.+) %{HTTP_HOST}$1 [C] RewriteRule ^www\.([^.]+)\.mysite\.ie(.*) http://www.mysite.biz/users/sites/$1 adrian.