Using session to display images

[eluser]BigJoe[/eluser]
When a user logs in and CI loads it from the database. I'm trying to get CI to display the image.

Code:

$data = array(
  'user_rank'   => 'pro-guest.png';
);
$this->session->set_userdata($data);

Then I try and display this on the page.

Code:

echo '<img src="images/ranks/'.$this-&gt;session-&gt;userdata('user_rank').' ">';

So far nothing I tried seems to work. Any one have any ideas.

Joe