Simple Social Icons plugin not work on my blog

Simple Social Icons plugin not work on my blog

I am using http://wordpress.org/plugins/simple-social-buttons/ Plugin, but its not working properly. This plugin worked on GoPress theme, but is not working on Ribbon theme, which I downloaded from http://www.spiceupyourblog.com/
Problem with plugin:
Social icon button does not display on archives. But in Gopress theme it displayed
this is a code that display archives,
<article class="article">
    <div id="content_box" class="home_page">
        <?php if (have_posts()) : while (have_posts()) : the_post(); ?>
            <div class="post excerpt <?php echo (++$j % 2 == 0) ? 'last' : ''; ?>">
                <div class="post-date-ribbon"><div class="corner"></div><?php the_time('d M Y'); ?></div>
                <header>
                    <h2 class="title">
                        <a href="<?php the_permalink() ?>" title="<?php the_title(); ?>" rel="bookmark"><?php the_title(); ?></a>
                    </h2>
                    <div class="post-info">
                        <div class="author_mt hp_meta"><span class="mt_icon"> </span><?php _e('By ','mythemeshop'); ?><?php the_author_posts_link(); ?></div>
                        <div class="cat_mt hp_meta"><span class="mt_icon"> </span><?php the_category(', '); ?></div>
                        <div class="comment_mt hp_meta"><span class="mt_icon"> </span> <a href="<?php comments_link(); ?>"><?php comments_number(' 0 Comments',' 1 Comment',' % Comments'); ?></a></div>
                    </div>
                </header><!--.header-->
                <a href="<?php the_permalink() ?>" title="<?php the_title(); ?>" rel="nofollow" id="featured-thumbnail">
                    <?php if ( has_post_thumbnail() ) { ?>
                        <?php echo '<div class="featured-thumbnail">'; the_post_thumbnail('featured',array('title' => '')); echo '</div>'; ?>
                    <?php } ?>
                </a>
                <div class="post-content image-caption-format-1">
                    <?php echo excerpt(56);?>
                </div>
                <div class="readMore"><a href="<?php the_permalink() ?>" title="<?php the_title(); ?>" rel="bookmark"><?php _e('Read More','mythemeshop'); ?></a></div>
            </div><!--.post excerpt-->
        <?php endwhile; else: ?>
            <div class="post excerpt">
                <div class="no-results">
                    <p><strong><?php _e('There has been an error.', 'mythemeshop'); ?></strong></p>
                    <p><?php _e('We apologize for any inconvenience, please hit back on your browser or use the search form below.', 'mythemeshop'); ?></p>
                    <?php get_search_form(); ?>
                </div><!--noResults-->
            </div>
        <?php endif; ?>
        <?php if ($options['mts_pagenavigation'] == '1') { ?>
            <?php pagination($additional_loop->max_num_pages);?>
        <?php } else { ?>
            <div class="pnavigation2">
                <div class="nav-previous"><?php next_posts_link( __( '&larr; '.'Older posts', 'mythemeshop' ) ); ?></div>
                <div class="nav-next"><?php previous_posts_link( __( 'Newer posts'.' &rarr;', 'mythemeshop' ) ); ?></div>
            </div>
        <?php } ?>     
    </div>
</article>