ErrorException [ Error ]: Class 'Orm\Model' not found

ErrorException [ Error ]: Class 'Orm\Model' not found

APPPATH/classes/model/blogtest.php @ line 5

 0
 1<?php
 2use Orm\Model;
 3
 4class Model_Blogtest extends Model
 5{
 6    protected static $_properties = array(
 7        'id',
 8        'name',
 9        'description',
10        'created_at',

If you are getting problem in development on fuelPHP. Please Load ORM package by un commenting  

 'packages'  => array(
   'orm','auth'
   ), on  app/config/config.php file.