Problem in Structures_DataGrid

[satheeshgk]

please help me to sole this problem
am new in php, i am using pear DB table for my php project, it is very useful for me to make database related projects.

Now i have a problem while using PEAR dataGrid, i try to make similary in this tutorial "http://www.samalyse.com/code/pear/dgdo/" like
<?php
require_once("../includes/config.php");
require_once("../includes/dbConnect.php");
require_once("../class/admin.php");
require_once("../class/menu.php");
require_once("../class/pager.php");
require_once("Structures/DataGrid.php");
require_once("DB/DataObject.php");

class DataObject_Fruits extends DB_DataObject
{
var $__table = "tbl_admin";
var $menu_id;
var $menu_name;
var $parent_id;
var $menu_level;
}

$dataobject = new DataObject_Fruits();
print_r($dataobject);
$datagrid =& new Structures_DataGrid(10);
$datagrid->bind($dataobject);
print_r($datagrid->render());
?>

but this program display an error like
"Unknown Renderer driver. Please specify an existing driver", i didnt know the problem, please help me to sole this one.

[satheeshgk]

my OS is XP, plz any one help me to solve this problem

thanks