Change Header for custom post typer

I would like to have a different header image for custom post type, posts & archive. I have gotten the header to change with

<?php if( is_page('dm') ) : ?>
			<img src="http://69.195.124.89/~openonth/213/wp-content/uploads/2013/02/header2.gif" class="header-image" width="<?php echo get_custom_header()->width; ?>" height="<?php echo get_custom_header()->height; ?>" alt="" />		

		<?php else : ?>

in the header just above the regular header custom image in header.php but it only words on a static page DM.

the site:
http://69.195.124.89/~openonth/213/
the costome post type archive:
http://69.195.124.89/~openonth/213/dm/

🙂