CustomPress ordering by custom field using datepicker

Hey, I’m trying to figure out how to display a list of PDFs by date. I currently added a date picker as a custom field in CustomPress to grab the date. The client wishes the list to display by most recent date to most past date. For instance, they want a July 2015 to show up before a June 2015 and May 2015, etc.

<ul>
<?php
$args = array(
'post_type' => 'attachment',
'posts_per_page' => -1,
'order' => 'DESC',
'meta_key' => 'ct_Image_Date_datepicker_e805',
'orderby' => 'meta_value',
'meta_query' => array(
array('key' => 'ct_Image_Date_datepicker_e805',
'value' => date( 'M j, y' ),
'compare' => '<'
)
),
'category' => get_cat_id( single_cat_title("",false) )
);
$attachments = get_posts($args);
foreach ($attachments as $post): setup_postdata($post);
$ID = get_the_ID();
$page_data = get_post($ID, ARRAY_A);
$content = $page_data['post_content'];
$title = $page_data['post_title'];
$file = $page_data['guid'];
#echo $title . ' ' . $content;
#echo '<p>&nbsp;<hr />&nbsp;</p>';
#echo '<img src="img/pdf-icon.png">' . the_attachment_link($post->ID, false) . ' | ' . $title . '<br />';
echo '<img src="' . get_template_directory_uri() . '/img/pdf-icon.png" style="margin-right:5px;">' . '<a href="' . $file . '">' . $title . '</a>' . '<br />';

#. ' | ' . do_shortcode('[ct id="ct_Image_Date_datepicker_e805" property="title | description | value"]') .
endforeach;
wp_reset_postdata();
?>
</ul>

I have no idea what I’m doing wrong. I’ve looked at other past date picker support tickets and I’ve tried those queries.. unsuccessful.

Thanks!