Change wording of leave a reply- solution not working

Hi
searched this subject and the reply a year ago was for wordpress 3.0. Does not seem to work on 3.2.1 version. I am using the Twenty Eleven template if that makes a difference. I have pasted and extract from the solution for 3.0 below if that gives anyone better at this sort of thing than I a head start.

Any help greatly appreciated, thanks

wordpress 3.0 .. bottom line of your comment.php file .. you can override a number of presets that appear on the comments form .. for example:

<?php comment_form(array(‘title_reply’ => “Please leave a comment”, ‘comment_notes_after’ => “”)); ?>

‘title_reply’ => “Please leave a comment”
changes ‘Leave a Reply’ to ‘Please leave a comment’

‘comment_notes_after’ => “”
removes the html hints that appear below the comment form

for all function references see