title: How to posting message on user wall (offline_access) when user is not logged in
body: <p>I got an error:</p>
  
  <blockquote>
    <p>Fatal error: Uncaught OAuthException: Error validating access token: This may be because the user logged out or may be due to a system error. thrown in /var/www/html/kimunita/dev/include/base_facebook.php on line 1106</p>
  </blockquote>