Highlight current Custom Taxonomy and Custom Post Type

I want to highlight the current post that is being displayed.

I have created a custom post_type: Evaluations

Within the custom post_type, I have several custom categories.

I use this code to display the custom post under the category/slug: evaluations

<h2>ARCHIVED EVALUATIONS</h2>
<ul>
<?php
 $args=array(
'post_type' => 'evaluations',
'cat' => '32',
'showposts' => -1,
 );
 query_posts($args); ?>
        <?php if (have_posts()) : ?>

		<?php while (have_posts()) : the_post(); ?>

        <li<?php if ( $post->ID == $wp_query->post->ID ) { echo ' class="current"'; } else {} ?>>

            <a href="<?php the_permalink() ?>"><?php the_title(); ?></a></li>
 <?php endwhile; ?>
 <?php endif; ?>
</ul>

Now, when a user clicks on one of the post, it should display it in the single_evaluation.php template. Whn being displayed, the post should be assigned the “class=current”, and to have the link be highlighted and the others not.

Instead, I get all the links highlighted, because “class=current” has been assigned to all.

any help will be appreciated!