Featured Category Slider Problem

I have a home page slider on a theme I’m building that’s set to display an image from the “Featured” category. It works brilliantly except for one problem;

If someone marks a post in the Featured category AND a 2nd category, the slider won’t display that post’s featured image. For example, if the post’s category is ticked off as “Featured” & “Sports”, it won’t display in the slider. Only if the post is “Featured”.

I’ve scoured the forum already thinking that someone must have brought this up before but I haven’t found an answer.

Here is my code for the slider:

<ul id="s3sliderContent">
   <?php
	$args=array(
	'cat' => Featured,
	'showposts' => 3,
	'caller_get_posts' => 1
	);
        $my_query = new WP_Query($args);
	if( $my_query->have_posts() ) {
        while ($my_query->have_posts()) : $my_query->the_post(); ?>
<li class="s3sliderImage">
<a href="<?php echo the_slug(); ?>" >
<img class="sliderThumb" src="<?php bloginfo('template_directory'); ?>/timthumb.php?src=<?php echo get_post_meta($post->ID, "Featured", $single = true); ?>&h=250&w=900&zc=1" alt="<?php the_title(); ?>"  width="900px" height="250px" />								</a>
<span><?php the_title(); ?></span>
</li>
    <?php endwhile;
	} //if ($my_query)
	wp_reset_query(); //Restore global post data stomped by the_post().
    ?>
</ul> <!-- end #s3sliderContent -->