又来麻烦大伙了 [ 新手入门 ]

public function actionProcessAdmin()
{
	$model = new A();
	$model->unsetAttributes(); // clear any default values		
	$criteria = new CDbCriteria;
	$criteria->addInCondition('status', array(2,3,4));		
	$data = new CActiveDataProvider($model, array(
			'criteria'=>$criteria,
	));	
	$this->render('admin',array(
            'model'=>$model,
	));
}

为什么addInCondition 条件没有执行啊？