找不到Typo3调度器类

我正在尝试在typo3上运行调度程序类。

ext_autoload.php:

$extensionPath = t3lib_extMgm::extPath('mh_compass');
$loaderClass = array(
    'tx_monitorcompassdailyreset_sched' => $extensionPath.'scheduler/class.tx_monitorcompassdailyreset_sched.php',
);
return $loaderClass;

ext_localconf.php:

  $GLOBALS['TYPO3_CONF_VARS']['SC_OPTIONS']['scheduler']['tasks']['tx_monitorcompassdailyreset_sched'] = array(
      'extension'        => $_EXTKEY,
      'title'            => 'Compass Monitor Daily Reset Scheduler',
      'description'      => 'Reset daily Monitor Jobs',
  );

class.tx_monitorcompassdailyreset_sched.php:

class tx_monitorcompassdailyreset_sched extends tx_scheduler_Task {
    public function execute() {
        error_log( "Start Compass Monitor Daily Reset Scheduled Job" );
        //do some stuff
        error_log( "Finished Compass Monitor Scheduled Job" );
    }
}

当我尝试在后端调度程序中添加任务时，我得到以下错误:

Fatal error: Class 'tx_monitorcompassdailyreset_sched' not found in /var/www/typo3_src-4.5.22/t3lib/class.t3lib_div.php on line 5375

这没有意义，因为a)我已经对该函数使用了调试，它加载了所有其他类，b)我无法看到我的类命名中的差异。

php的版本是5.3.10(有一个类似的错误在5.3.2，但它消失了)