I installed and configured your plugin on my site:
However, one person reported that it did not display the word verification field. I tested and sure enough it is not displayed. I use Genesis and child theme Crystal. In the FAQ you indicate that there should be <?php comment_form(); ?> in the functions.php and that I should look at Twenty Twelve to see how it is done. I cannot find this code in the functions.php file of Twenty Twelve. Where and how this should be inserted?