control层扩展

按继承扩展方法扩展了project-control的task方法，扩展文件module/project/ext/control/task.php

代码格式：

include '../../control.php';
class myProject extends project
{
    public function task($projectID = 0, $status = 'unclosed', $param = 0, $orderBy = '', $recTotal = 0, $recPerPage = 100, $pageID = 1)
    {

    }

}

打开界面报错ERROR: the control project not found in framework\base\router.class.php on line 1650, last called by www\index.php on line 71 through function loadModule.
in framework\base\router.class.php on line 2224 when visiting /zentaopms/www/index.php?m=project&f=task&projectID=1

请问这种报错是什么方面的问题？