The page genuinely contains the following tag:

Code:
 <meta name="robots" content="noindex, nofollow" />
This is the entire indexing issue and you need to correct it ASAP or your rank will tank.

My guess is that includes/templates/your_template/html_header.php has been changed and broken.

Look for the code

Code:
 <meta name="robots" content="noindex, nofollow" />
and examine the block, the entire code for this area should look like

Code:
<?php if (defined('ROBOTS_PAGES_TO_SKIP') && in_array($current_page_base,explode(",",constant('ROBOTS_PAGES_TO_SKIP'))) || $current_page_base=='down_for_maintenance' || $robotsNoIndex === true) { ?>
<meta name="robots" content="noindex, nofollow" />
<?php } ?>
~Melanie