Problem with user registration

Hi guys,
I've a problem with user registration: when I try to create a new user from http://drupal.print/en/user/register , drupal show me this message: "requested page could not be found." and no new user is created. Probably the link is incorrect http://drupal.print/en/en/user/register (two "en" is right?).
What can I do?

Thanks a lot.

Nicolo'