Thanks for your effort. I am not very familiar with php and the comment template includes too many variables.
If this could be of any help, I have copied the comment template text below.
<div id="comments-template">
<?php if ( have_comments() ) : ?>
<div id="comments">
<h3 id="comments-number" class="comments-header"><?php comments_number( sprintf( __('No responses to %1$s', 'buddypress'), the_title( '“', '”', false ) ), sprintf( __('One response to %1$s', 'buddypress'), the_title( '“', '”', false ) ), sprintf( __('%1$s responses to %2$s', 'buddypress'), '%', the_title( '“', '”', false ) ) ); ?></h3>
<?php do_action( 'bp_before_blog_comment_list' ) ?>
<ol class="commentlist">
<?php wp_list_comments( array( 'style' => 'ol', 'type' => 'all' ) ); ?>
</ol><!-- .comment-list -->
<?php do_action( 'bp_after_blog_comment_list' ) ?>
<?php if ( get_option( 'page_comments' ) ) : ?>
<div class="comment-navigation paged-navigation">
<?php paginate_comments_links(); ?>
</div>
<?php endif; ?>
</div><!-- #comments -->
<?php else : ?>
<?php if ( pings_open() && !comments_open() && is_single() ) : ?>
<p class="comments-closed pings-open">
<?php printf( __('Comments are closed, but <a href="%1$s" title="Trackback URL for this post">trackbacks</a> and pingbacks are open.', 'buddypress'), trackback_url( '0' ) ); ?>
</p>
<?php elseif ( !comments_open() && is_single() ) : ?>
<p class="comments-closed">
<?php _e('Comments are closed.', 'buddypress'); ?>
</p>
<?php endif; ?>
<?php endif; ?>
<?php if ( comments_open() ) : ?>
<div id="respond">
<h3 id="reply" class="comments-header">
<?php comment_form_title( __('Leave a Reply', 'buddypress'), __('Leave a Reply to %s', 'buddypress'), true ); ?>
</h3>
<p id="cancel-comment-reply">
<?php cancel_comment_reply_link( __('Click here to cancel reply.', 'buddypress') ); ?>
</p>
<?php if ( get_option( 'comment_registration' ) && !$user_ID ) : ?>
<p class="alert">
<?php printf( __('You must be <a href="%1$s" title="Log in">logged in</a> to post a comment.', 'buddypress'), wp_login_url( get_permalink() ) ); ?>
</p>
<?php else : ?>
<?php do_action( 'bp_before_blog_comment_form' ) ?>
<form action="<?php echo get_option( 'siteurl' ); ?>/wp-comments-post.php" method="post" id="commentform" class="standard-form">
<?php if ( $user_ID ) : ?>
<p class="log-in-out">
<?php printf( __('Logged in as <a href="%1$s" title="%2$s">%2$s</a>.', 'buddypress'), bp_loggedin_user_domain(), $user_identity ); ?> <a href="<?php echo wp_logout_url( get_permalink() ); ?>" title="<?php _e('Log out of this account', 'buddypress'); ?>"><?php _e('Log out »', 'buddypress'); ?></a>
</p>
<?php else : ?>
<?php $req = get_option( 'require_name_email' ); ?>
<p class="form-author">
<label for="author"><?php _e('Name', 'buddypress'); ?> <?php if ( $req ) : ?><span class="required"><?php _e('*', 'buddypress'); ?></span><?php endif; ?></label>
<input type="text" class="text-input" name="author" id="author" value="<?php echo $comment_author; ?>" size="40" tabindex="1" />
</p>
<p class="form-email">
<label for="email"><?php _e('Email', 'buddypress'); ?> <?php if ( $req ) : ?><span class="required"><?php _e('*', 'buddypress'); ?></span><?php endif; ?></label>
<input type="text" class="text-input" name="email" id="email" value="<?php echo $comment_author_email; ?>" size="40" tabindex="2" />
</p>
<p class="form-url">
<label for="url"><?php _e('Website', 'buddypress'); ?></label>
<input type="text" class="text-input" name="url" id="url" value="<?php echo $comment_author_url; ?>" size="40" tabindex="3" />
</p>
<?php endif; ?>
<p class="form-textarea">
<label for="comment"><?php _e('Comment', 'buddypress'); ?></label>
<textarea name="comment" id="comment" cols="60" rows="10" tabindex="4"></textarea>
</p>
<?php do_action( 'bp_blog_comment_form' ) ?>
<p class="form-submit">
<input class="submit-comment button" name="submit" type="submit" id="submit" tabindex="5" value="<?php _e('Submit', 'buddypress'); ?>" />
<input class="reset-comment button" name="reset" type="reset" id="reset" tabindex="6" value="<?php _e('Reset', 'buddypress'); ?>" />
<?php comment_id_fields(); ?>
</p>
<div class="comment-action">
<?php do_action( 'comment_form', $post->ID ); ?>
</div>
</form>
<?php do_action( 'bp_after_blog_comment_form' ) ?>
<?php endif; ?>
</div>
<?php endif; ?>
</div>