Clicking on grey oblong, with red and white text, takes you a standard 'Not logged in' message, i.e:
"Message:
You are not logged in or you do not have permission to access this page. This could be due to one of several reasons:
You are not logged in. Enter the user name and password and try again.
You do not have permission to access this page. Perhaps you are trying to access administrative features or some other privileged system.
The administrator may have disabled your account, or you do not activation."
If you want to register you need to click on the third link along at the top of the page (Регистрация).