title: Login issue after setting memcache session in magento
body: <p>Admin and customer cannot login in magento after the following changes :
  I enabled the memcache session in magento by editing local xml with the following lines</p>
  
  <pre><code>    &lt;session_save&gt;&lt;![CDATA[memcache]]&gt;&lt;/session_save&gt;
      &lt;session_save_path&gt;&lt;![CDATA[tcp://XX.XX.XX.XX:11212?persistent=0&amp;weight=2&amp;timeout=10&amp;retry_interval=10]]&gt;&lt;/session_save_path&gt;
      &lt;!--session_save&gt;&lt;![CDATA[files]]&gt;&lt;/session_save--&gt;
  </code></pre>
  
  <p>After that I cleared the magento cache from admin,after that I cannot login back to admin panel neither can login from the frontend.</p>
  
  <p>Any fix for this issue?</p>