Mandatory information about my setup:

Have I searched the tickets before posting? yes
Have I searched the forum before posting? yes
Have I read the documentation before posting (which pages?)? yes
Joomla! version: 2.5.27
PHP version: 5.3.26
MySQL version: 5.0.8
Matukio version: 5.1.2
Direct link to the page that shows the issue: http://www.miemrpr.com/conference/event/0/43-hospice-toolkit-2015/2-hospice-toolkit-2015


Description of my issue: When trying to book an event, I get a 404 after inputting my information in step 1. I have two payment extensions active: Paypal and Check. I don't really know what else I can do here...