Planet CakePHP

Hello,
I've created a blog site from "Beginning CakePHP from novice to professiona"-David Golding. I have the comment view listed below:

<?php echo $form->create('Comment');?>
    

    	
<?php __('Add Comment');?>
    <?php
    	echo $form->input('name');
    	echo $form->input('content');
    	echo $form->input('post_id');
    ?>
    
<?php echo $form->end('Submit');?>


    

    	
<?php echo $html->link(__('List Comments', true), array('action' => 'index'));?>
    	
<?php echo $html->link(__('List Posts', true), array('controller' => 'posts', 'action' => 'index')); ?> 
    	
<?php echo $html->link(__('New Post', true), array('controller' => 'posts', 'action' => 'add')); ?> 
    

The problem is after i press Submit the values remains in name and content fields.
Can anybody help me?

Thanks,