title: Error in using common session for codeigniter driven subdomains
body: <p>I have some codeigniter driven sub-domains and using native codeigniter session library. There is a sub-domain that creates and updates the session and other sub-domain has to share the session. I am not able to share the session among other sub-domains. I have changed the config parameter in <strong>application/config.php</strong></p>
  
  <pre><code>$config['cookie_domain']    = "example.com";
  </code></pre>
  
  <p>but it's not working.</p>