Radio ButtonList not submit

Hello all friends in yii Plz help me!!

I use radio box for field quired when I am select it and then submit it always show this field cannot be blank.

this is my view

 <?php

                $accountStatus = array(1=>'Prepaid',2=>'Collect');

                echo $form->radioButtonList($model,'freight',$accountStatus,array('separator'=>' '));  

		?>

        

		<?php echo $form->error($model,'freight'); ?>

        <?php echo $form->hiddenField($model,'freight');?>

this is my controller

public function actionCreate()

	{

		$model=new Booking;


		// Uncomment the following line if AJAX validation is needed

		$this->performAjaxValidation($model);


		if(isset($_POST['Booking']))

		{

			$model->attributes=$_POST['Booking'];

			if($model->save())

				$this->redirect(array('view','id'=>$model->id));

		}


		$this->render('create',array(

			'model'=>$model,

		));

	}

comment line // $this->performAjaxValidation($model);

Hi LeQuoc! I been comment this line too but it still show the same. Field cannot be blank.

Now it work fine for me I find my problem is in my form I’m using enableClientValidation

but in my controller I performAjaxValidation