"Leave A Commet" Problem

Hi; I am trying to change "Leave a Comment" and comments texts to turkish. I changed comments.php like this <?php // You can start editing here -- including this comment! if ( have_comments() ): ?> <div id="comments"> <h2 id="comments-title"> <?php comments_number(__( 'Yorum Yok', 'simplecatch' ), __( '1 Yorum', 'simplecatch' ), __( '% Yorum', 'simplecatch' ) );?> </h2><!-- #comments --> by this way i changed the comment sending area but upper preview of posts stayed "comment" also i found "leave a comment" part in "simplecatch_functions.php" but when i edit it php goes blank. i cannot edit anything in simplecatch_functions.php please, i need help?