There is no avatars on recent comments rtMedia

Hello,

I use rtmedia + buddypress, when I use following standard loop for recent comments then there is only a default avatar of user is displayed. Avatar is displayed when somebody publish a comment on the blog section but it doesn’t work when somebody will comment photo.

$args_comm = array( 'number' => 5, 'status' => 'approve' );
$comments = get_comments($args_comm);
foreach($comments as $comment) { 
			echo my_get_comment_excerpt($comment->comment_ID, 22);
			echo get_avatar($comment->comment_author_email, 30);

					echo $comment->comment_author;
					echo get_comment_link($comment->comment_ID);
									$post_title = get_the_title($comment->comment_post_ID);
										if(strlen($post_title)>48){
											$post_title = mb_substr($post_title, 0, 40, 'utf-8');
											$post_title = $post_title . '...';
										}
									echo $post_title;
}