"Registration Complete!"
Registration appears to be functioning perfectly fine. Not quite sure what the issue is. However, viewing error logs you've fatal errors relating to CBs validation jQuery and CB Connections opensocial JS library (external). This appears to be some sort of conflict from your template.
Attempting to change templates the below appears.
"Fatal error: Call to a member function getDefaults() on a non-object in /home/vetsinpa/public_html/modules/mod_roknavmenu/lib/librokmenu/RokMenu.php on line 64"
Please discuss your issue further with rocketheme as appears a template problem or problem with their other extensions.