Problem overriding wordpress comments form and format


I´m having the same problem described in this post:

I am trying to get the posts to only display the option to comment via Facebook. I have tried checking the box that says override WordPress settings and use only Facebook comments but the WordPress comment option is still showing up on my posts

I think something in my theme is causing the wordpress comment to appear and it is not overrited. My theme use a comment.php file

Please help