It worked for me. I imported your store into my test site and it worked fine. The formatting was off but one thing at a time:
Things you need to make sure you do:
- make sure you are editing your blog's single.php file (or its equivalent).
- Make sure this code gets posted within The Loop:
<?php echo datafeedr_tag('web_codes_from_this_merchant?c=1122594&merchant='.get_the_title()); ?>
Read more about The Loop here: http://codex.wordpress.org/The_Loop
- make sure you are not viewing a cached version of your page