Hi Frank,
Go to the file location \components\com_easydiscuss\themes\simplistic\post.php
and look for the code at the bottom
<?php echo DiscussHelper::renderModule( 'easydiscuss-before-replyform' ); ?>
<?php echo $this->loadTemplate( 'post.reply.form.php' ); ?>
<?php echo DiscussHelper::renderModule( 'easydiscuss-after-replyform' ); ?>
Copy the code and put it in line 71.
If the issue still persist, kindly provide us with the joomla access and ftp so we can further assist you on the issue.