title: RewriteCond redirect to subdomain not working
body: <p>I cant make the rule to redirect the web page to a subdomain:</p>
  
  <p>if the url starts with <code>/tag</code> like this:</p>
  
  <pre><code>http://www.my-website.com/tag/music
  </code></pre>
  
  <p>it should be redirected to:</p>
  
  <pre><code>http://blog.my-website.com/tag/music
  </code></pre>
  
  <p>I've tried this:</p>
  
  <pre><code>RewriteCond %{HTTP_HOST} ^www\.my-website\.com$ [NC]
  RewriteRule ^/tag/?(.*)$ http://blog.my-website.fr/tag/$1 [QSA,L,R=301]
  </code></pre>
  
  <p>but it not redirecting.. it stays on www.</p>
  
  <p>What am i doing wrong?</p>
  
  <p>Thanks</p>