How to display thumbnail image on theme shopperpress

Hi all!
I use wordpress 3.3.2 and theme shopperpress 6.7, but I’m having problems when displaying the thumbnail image on the sidebar.

my code:

`<?php
global $post;
$categories = get_the_category();
$category = $categories[0];
$cat_ID = $category->cat_ID;
$myposts = get_posts(“numberposts=10&category=$cat_ID”);
?>
<?php foreach($myposts as $post) :?>
<p>
“”><?php the_title(); ?>
</p>
<?php endforeach; ?>

and I can not display the thumbnail image.

please help me. thank all for help. Sorry, my english’s not good.