title: Yii FileLogging not working on 1 server and working on the other
body: <p>A client has two diffent servers with the same application build with the Yii framework. The logging configuration of both environments is exact the same:</p>
  
  <pre><code>'log' =&gt; array(
                 'class' =&gt; 'CLogRouter',
                 'routes' =&gt; array(
                     array(
                         'class' =&gt; 'CFileLogRoute',
                         'levels' =&gt; 'error, warning, info',
                     )                        
                 ),
          ),
  </code></pre>
  
  <p>The access rights to the folder "runtime" are set to 755 on DEV and 777 on LIVE. 
  It is working on DEV but on LIVE there are no files created. The runtime folder is empty.</p>
  
  <p>If the logs files are deleted, does it stop working? Does Yii need empty .log and .log.# files to begin with?</p>
  
  <p>What else can be the problem?</p>