title: CFileLogRoute error
body: <p>i want to create new log file for with my custom error or custom messages but i am not able to do that. even i have made the changes in main.php file as well.</p>
  
  <pre><code>        array(
                  'class'=&gt;'CFileLogRoute',
                  'levels'=&gt;'mailerror',
                  'categories'=&gt;"system.*",
                  'logFile'=&gt;'mailError.log'.date('d-m-y s'),
              ),
  
              array(
                  'class'=&gt;'CFileLogRoute',
                  'levels'=&gt;'error, info',
              ),
  </code></pre>
  
  <p>and after this when i am trying to test my code on index.php this is my code</p>
  
  <pre><code>echo Yii::log("Mailer Error ",'mailerror','system.*');
  </code></pre>
  
  <p>then this is not working. nothing is happening.</p>