David Thomas Baker » Web » Drupal - "Access Denied" user accounts orders

In the file /includes/session.inc change:

function sess_write($key, $value) {
    global $user;
    db_query("UPDATE {sessions} SET uid = %d, hostname = '%s', session =
    '%s', timestamp = %d WHERE sid = '%s'", $user->uid,
    $_SERVER["REMOTE_ADDR"], $value, time(), $key);
    return '';
}

to

function sess_write($key, $value) {
    global $user;

if($user->uid)
    db_query("UPDATE {sessions} SET uid = %d, hostname = '%s', session =
    '%s', timestamp = %d WHERE sid = '%s'", $user->uid,
    $_SERVER["REMOTE_ADDR"], $value, time(), $key);
 else
   db_query("UPDATE {sessions} SET hostname = '%s', session = '%s', 
   timestamp = %d WHERE sid = '%s'", $_SERVER["REMOTE_ADDR"], $value,
   time(), $key);

    return '';
}