Why can I not register for an event?

I am having trouble registering for an event. I have filled out the initial form and selected the event, but when I push the submit registration button I get an error on page message and can go no further. My name is Bryan Chapman, I am attempting to register for Le Tour De Tick in Neosho. I have tried a few times in the past couple of days. Thank you. My E-mail address is bryan.chapman64@yahoo.com