At least one field must be set for HatomEntry

Hi, Anyone help me to fix this problem.
When i test any post in Google richsnippet tool it till me everything appear right except that:

hatom-feed
hatom-entry:
Warning: At least one field must be set for HatomEntry.
Warning: Missing required field “entry-title”.
Warning: Missing required field “updated”.
Warning: Missing required hCard “author”.

And My single.php code is

<header>
<h1 class="title single-title"><?php the_title(); ?></h1>
<?php if($mts_options['mts_headline_meta'] == '1') { ?>
<div class="post-info">

<span class="theauthor"><i class="icon-user"></i> <?php  the_author_posts_link(); ?></span>

<span class="thetime"><i class="icon-calendar"></i> <?php the_time( get_option( 'date_format' ) ); ?></span>

Any one Help Please