When I try to register it is throwing errors and I see it is redirected to this error message.

Try here : http://al-hedayawestcobb.com/index.php/component/users/?view=registration

0
Error
Invalid controller: name='registration', format=''
You may not be able to visit this page because of:
an out-of-date bookmark/favourite
a search engine that has an out-of-date listing for this site
a mistyped address
you have no access to this page
The requested resource was not found.
An error has occurred while processing your request.