PHP Fatal error:とFatal error:

 PHP Fatal error: Class 'PluginScheduleTable' not found in /home/xxx/xxx.xxx/openpne/lib/model/doctrine/opCalendarPlugin/ScheduleTable.class.php on line 9

 Fatal error: Class 'PluginScheduleTable' not found in /home/xxx/xxx.xxx/openpne/lib/model/doctrine/opCalendarPlugin/ScheduleTable.class.php on line 9

ScheduleTable.class.php

 <?php

/**
* ScheduleTable
*
* This class has been auto-generated by the Doctrine ORM Framework
*/
class ScheduleTable extends PluginScheduleTable
{
/**
* Returns an instance of this class.
*
* @return ScheduleTable The table instance
*/
public static function getInstance()
{
return Doctrine_Core::getTable('Schedule');
}
}