Problem with PDF upload link

At work we have been using a method of uploading a pdf file as a rate sheet, as seen here http://www.westernbanc.com/rates

Recently the method we were using stopped working, after a plugin/wp update I believe.

So what we were doing; I had created a new field in WP called Rate Sheets. In the field, someone could upload a PDF to the site and the code written would find the most current version of the PDF and embed it on the rate link I provided.

Recently it has stopped finding the most current PDF and we have had to manually insert the PDF name / location where $link is located in the code. Here is the current code.

functions.php

// Send most recent rate sheet doc if found.
    function get_rate_sheet() {

        $item = get_posts(array(
            'post_type' => 'rate-sheet',
            'posts_per_page' => 1,
            'orderby' => 'date',
            'order' => 'DESC'
        ));
        if ($item) {
            $item = $item[0];
            $id = get_post_meta($item->ID, 'file', 1);
            $link = wp_get_attachment_url($id);
            /*
            if ($link) {
                //header("Location: $link");
                wp_redirect($link,301);
                die();
            }
            */
            return $link;
        }

    }

And the wbc_ratesheet.php code

<?php
/*
Template Name: Rate Sheet
*/

// Load the rate sheet doc.  Show page as fallback.
$rateLink = $tcms->get_rate_sheet();

get_header();

global $post;
if (have_posts()) {
	the_post();
}

?>
<?php /*<h2 class="contentHeader"><?php the_title(); ?></h2>*/ ?>

<!-- .contentArea -->
<div class="contentArea">

  <h2 class="pageHeading"><?php the_title(); ?></h2>
  <div class="post">
    <div class="entry">
    	<div id="dlink"><a href="<?php echo $link; ?>" target="new">Download this rate sheet</a></div>
      <iframe src="<?php echo $link; ?>" frameborder="0" id="iframe2" style="width:100%;height:1030px" ></iframe>
    </div>
  </div>

  <div class="clear"></div>
</div>
<!-- / .contentArea -->

<?php get_footer(); ?>

Any clue as to why this is not working anymore?