Multiple Uploads Won't Work

We have a form here:
http://www.aianwpr.org/2013-rda-upload/

There are three file uploads. When I hit submit, a modal window appears saying “Uploading” then nothing.

This is a huge issue as the plugin used to work. We have not made any changes to either WordPress Core or your plugin.

http://wordpress.org/extend/plugins/formidable/