Directory Plugin - Signup Link Graphic (not working) Signup Link in Menu Works?

I installed a new WP install to use the included theme in Directory Plugin.
It's here: http://searchenginemarketing.net/directory
My current problem / question is the signup links: The one in the top navigation menu works fine. However, the signup graphic below the "what can we find for you" results in a 404 error.
How can I address this?