In order to get to the profile page, the user must be logged in.
you need to add the Authenticate User server behavior to the registration page as I stated in my initial response, there is no Authenticate user behavior added to the registration page you have sent.
Follow these steps:
1) double click the insert record server behavior and remove the redirect to the visitors_Profile.php page.
2) Add the security Assist Authenticate user behavior to log the user in. Set it to redirect to the visitors_Profile.php page. make sure the Authenticate User Behavior is after the Insert Record behavior.