image for site name

I am trying to replace my site title with an image. Below is the code in my header.php for my twenty twelve theme:

<h1 class=”site-title”>” title=”<?php echo esc_attr( get_bloginfo( ‘name’, ‘display’ ) ); ?>” rel=”home”><?php bloginfo( ‘name’ ); ?></h1>

Then I replaced it with this:
<h1 class=”site-title”><img src=”http://rufftalk4dogs.com/?attachment_id=138a&#8221; /></h1>
It almost works :(. I get the dreaded “x” where the image should be.
What am I missing?
I have the image in my media library.
Any help would be appreciated. Thank you