Backend pagination problem in joomla1.7 component development

Hi,
  I am new to joomla component development.Now i am creating a simple image gallery.I have created it sucessfully in joomla1.6. But a small pagination problem while using it in joomla 1.7.The backend pagination is not working. I am using the tutorial "http://blog.opensourcenetwork.eu/tutorials/guru/mvc-workflow-with-jpagination".i am including the code here.
In model :
<?php
defined('_JEXEC') or die( 'Restricted access' );
jimport('joomla.application.component.model');

class ComponentnameModelModelname extends JModel
{
    var $_data = null;
    var $_total = null;
    var $_pagination = null;

    function __construct()
    {
              parent::__construct();
            $application = JFactory::getApplication() ;

            $config = JFactory::getConfig() ;

            $limitstart = JRequest::getInt( 'limitstart', 0 );
              //  $limit = $application->getUserStateFromRequest( 'global.list.limit',
                   // 'limit', $config->getValue('config.list_limit'), 'int' );       
            $limit = 1;
            $this->setState('limitstart', $limitstart);
            $this->setState('limit', $limit);
       
    }
      
    function _loadData()
    {
           if (empty($this->_data) && empty($this->_total))
        {
           
            $album = JRequest::getVar( 'album');
           
               $query = "SELECT * FROM #__databasename WHERE albumname='".$album."'";
            $this->_db->setQuery($query);

            $this->_data = $this->_db->loadObjectList();
            $this->_total = count( $this->_data ) ;

        }

        return $this->_data ;
          
    }
   
    function getData()
    {
        $this->_loadData() ;
    $album = JRequest::getVar( 'album');
  
        $limitstart = $this->getState('limitstart');
        $limit = $this->getState('limit');

       return array_slice( $this->_data, $limitstart,  $limit);
    }
   
    function getTotal()
    {
       return $this->_total;
          
    }
   
    function getPagination()
    {
            $this->_loadData() ;

        if (empty($this->_pagination))
        {
            jimport('joomla.html.pagination');

                $limitstart = $this->getState('limitstart');
            $limit = $this->getState('limit');
               $total = $this->getTotal();
   
            $this->_pagination = new JPagination( $total, $limitstart,$limit);
        }

        return $this->_pagination;
          
     }
}
?>

In views/photos/tmpl/default.php
<?php
defined('_JEXEC') or die( 'Restricted access' );
$host = JURI::root();
jimport('joomla.html.pagination');
?>
<form name="adminForm" method="post">
    <div class = "photo">
        <img src="<?php echo $host?>images/<?php echo $item->image;?>" height = "300" width = "300" alt = "no image" />
         </div>
    <div id="photopagination">
        <?php  echo $this->pagination->getPageslinks();?>
    </div>
   <div style="display:none">
        <?php  echo $this->pagination->getListFooter(); ?>
    </div>
</form>

I am using a form named admin form in template file.When i add the getListFooter function only,pagination is working in backend.Is ant modification needs to be done in joomla 1.7 for working this???