Inspecting the registration link on the button, it's pointing at "/index.php/en/component/users/?view=registration". When clicked that's being redirected to "index.php/en/component/users/?view=login". There's something on your site that's redirecting the link. If I type in "index.php?option=com_users&view=registration" myself and not from the SCLogin module, it's being redirected to the login view as well.
Please check that you don't have any aliases set up in extensions such as SH404. Verify that New User Registration is enabled in your Joomla Users parameters.
Thank you Melissa, I didn't see your reply because was expected e-mail notification on it and now just decide to check it here.
The problem was on Joomla New User Registration )))) sorry for donkey question ))))