Comments template in author.php file. How?

I would like to display the comments form on the author.php so that people can write comments about each author.

I duplicated the comments.php file and then added the following line of code the author.php file
<?php comments_template( '/rating-comments.php' );?>

It doesn’t work of course! 🙂

Any ideas how to make it work?

Thanks,
do77