Trouble creating custom comment_form

Hi, wordpress users. I am having hard time creating custom comment_form.
I am using Novita theme and by default comment_form is called with function <?php comment_form(); ?> in comments.php file.

As I am translating few text lines in other language and want to get rid of URL input box. I started searching and found there is a way to add filters to comment_form. You can see what I came with in my comments.php but unfortunately it doesn’t work..
* It’s not showing comment_field (Input fields: author, email, url).
* I can not get comment_notes_after to work in any way.
* The same with comment_notes_before

[Code moderated as per the Forum Rules. Please use the pastebin]

http://inline.lv/jaunumi/?p=1

It would be really nice if someone could guide me right direction.

P.S. The only way I got it working was modifying wp-includes/comment-template.php but it wouldn’t be best solution.