php - Yii $criteria->addBetweenCondition not Working in CDbCriteria

I want to get results of sender score between 1 to 10,So I have add this condtion.

   $criteria->addBetweenCondition('sender_score',$_GET['senderscore_start'],$_GET['senderscore_end']);
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sender_score is my table field, senderscore_start and senderscore_end are only public variables.

My Search From Code:

<div >    
  <?php echo $form->label($model,'senderscore_start'); ?>
  <?php echo $form->textField($model,'senderscore_start',array('size'=>60,'maxlength'=>100,'style'=>'width:300px;')); ?>   
</div> 
<div >    
  <?php echo $form->label($model,'senderscore_end'); ?>
  <?php echo $form->textField($model,'senderscore_end',array('size'=>60,'maxlength'=>100,'style'=>'width:300px;')); ?>    
</div>
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My Model Code:

public $senderscore_start;
public $senderscore_end;

array('senderscore_start,senderscore_end', 'safe', 'on'=>'search'),

$criteria->addBetweenCondition('sender_score',$_GET['senderscore_start'],$_GET['senderscore_end']);`
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But not showing results between 1,10 , can you look at this please! what's wrong with my code. `