well, obviously it doesn't exist.
This is what the link should be: http://www.nimrans.com/
Which is the same as: http://www.nimrans.com/index.php
Click those two links and see what happens ...
It looks a lot like a login to me.
Are you doing some funky mod rewrites in your .htaccess file?
You don't need to put each page or section in its own directory.
Not sure what this is all about ... what are these directories for?