uphichet

Dear kostas12345;
plaese amend the code in silverorchid/includes/gazpo_loop.php as the detail below

<?php
/**
 * Theme:  	  silverOrchid
 * Theme URL: http://gazpo.com/2012/04/silverorchid
 * Created:   April 2012
 * Author:    Sami Ch.
 * URL: 	  http://gazpo.com
 *
 **/
	$gazpo_settings = get_option( 'gazpo_options');
?>

<ul class="posts-list">
<?php
	if (have_posts()) :
			while (have_posts()) : the_post();
				?>
					<li id="post-<?php the_ID(); ?>" <?php post_class(); ?>>
						<h2><a href="<?php the_permalink(); ?>" title="<?php the_title(); ?>"><?php the_title(); ?></a></h2>

						<div class="post-meta">

							<span class="info">
								<span class="date"><?php the_time('M. d') ?></span>
								<span class="category"><?php the_category(', ' ); ?></span>
								<span class="comments"><?php comments_popup_link( __('no comments', 'silverorchid'), __( '1 comment', 'silverorchid'), __('% comments', 'silverorchid')); ?></span>
							</span>								

						</div> <!-- /post-meta -->

						<div class="entry">
							<div class="thumb">
								<?php the_post_thumbnail( 'thumbnail' ); ?>
							</div>
                            <p>
								<?php
									$content = get_the_content();
									$content = strip_tags($content);
									echo mb_substr($content, 0, 120). '...';
								?>
							</p>
						</div> <!-- entry -->

					</li><!-- /post-->

			<?php
				endwhile;
			endif;
		wp_reset_query();
		?>

</ul>

Also in silverorchid/style.css plase add more the code below

/* Amended By Myself */
#content .posts-list {
	margin: 10px 0 0 0;
	padding: 0;
	list-style: none;
}

#content .posts-list .post {
	float: left;
	width: 46.1%;
	height: 150px;
	margin-left: 5px;
	margin-bottom: 10px;
	border-bottom: 1px solid #E3E3E3;
	padding: 10px;
	overflow: hidden;
	background: #ffffff;
	background: -webkit-linear-gradient(top, #ffffff, #f6f6f6);
    background:    -moz-linear-gradient(top, #ffffff, #f6f6f6);
    background:     -ms-linear-gradient(top, #ffffff, #f6f6f6);
    background:      -o-linear-gradient(top, #ffffff, #f6f6f6);
	box-shadow: 0 1px 1px rgba(0, 0, 0, 0.1);
}
#content .posts-list .post h2 {
	font-size: 15px;
	line-height: 1.4em;
	margin-bottom: 0.4em;
}
#content .posts-list .post .entry img {
	float: left;
	margin-right: 10px;
	margin-bottom: 10px;
}

where width: 46.1%; is the column width you can adjust it as your request.
Regards,
U Phichet

really appreciated with your answer,
Maybe, I wrote the unclear question, first of all, I just globally enabled comment in Discussion Tab already. The main issue is there are no any comment boxes occur in the most of old posts that I’ve written before enable the globally comment system in Discussion Tab.
I’ve tried to to enable the comment in each old post, but I couldn’t found any bottom to do (WordPress 3.1.2).

Really appreciated with your support,
UPhichet