setvalue on element form on zend framework

[manjava]

I have the issue the name of representative it's not show in my form so my code:my formcusto

$rep = new Admin_Model_DbTable_Representative();
$representative = new Zend_Form_Element_Text('representative');
$representative->setLabel(Zend_Registry::get('Zend_Translate')->translate('representative'))
                     ->setRequired(true)
                     ->addValidator('notEmpty')
                     ->addFilter('StripTags')
                     ->addFilter('StringTrim')
                     ->setValue(Admin_Models_RepresentativeTools::getRepresentativeNamebyrepresentativecode($rep->getRepresentativeCode()));
$representative->getDecorator(('label'))->setOption('tag', 'span');
$this->addElement($representative);

and on my .phtml

<div class="row">
    <div class="col-md-2"><?php echo $this->element->representative->renderLabel(); ?></div>
    <div class="col-md-2"><?php echo $this->element->representative->renderViewHelper(); ?></div>   
</div><br>

I have always my code of representative but not the name i have this function :

$Representative = new Admin_Model_DbTable_Representative();
$represen = $Representative->fetchRow($Representative->select()->where( self::REPRESENTATIVECODE . ' = ? ', $representativecode));
if(!empty($represen))
    //echo'represen:'.var_dump($represen);
    {return $represen->representativename;}

Thanks in advance