[Plugin: Infinite-Scroll] Infinite Scroll Plugin doesn't load Posts

For my website, http://www.wwwbuildawebsite.com, running WordPress 3.3.2, the Infinite Scroll plugin doesn’t get the next set of posts. Instead, it just loads for a bit, and then shows that it is the end of the posts, when it is clearly not. This happens on all of the archive pages. THe plugin is currently only activated for admin users, as it is an online website. Script Version: 2.0b2.120226. Thank you. Custom Theme.

http://wordpress.org/extend/plugins/infinite-scroll/