Archives only display blog index page [closed]

Question

A long time ago I created a wordpress site for a local am-dram group at http://mersthamdrama.org.uk

I created a custom theme, and added some plugins to make it easy for editors to add Past Performances as what is effectively a custom post type (I used a plugin called Magic Fields at the time, as at that stage either native Custom Posts weren't available/didn't do what I needed/I hadn't discovered them!).

However I find that now, clicking on ANY of the monthly archive links, or individual blogpost permalinks displays just the blog index. I'm sure it used to work fine; presumably at some point some things got overwritten or a setting has changed, can anyone tell me what's up?

Archive.php below:

<?php
/**
 * @package WordPress
 * @subpackage Mads_Theme
 */

get_header(); ?>

    <div class="ImageBlock">
      <h5>
        <a href="http://mersthamdrama.org.uk/" class="body-item-link" title="permanent link">Our Latest Production</a>
      </h5>
      <img class="front-image" width="400" alt="Our Latest Production" src="http://mersthamdrama.org.uk/images/coarse-capers2.jpg" />
      <br />
      <p>Coarse Capers in performance at Merstham Village Hall</p>
    </div>
    <div class="page-title cushycms">
      <h2>News</h2>
    </div>
    <div class="body blog narrowcolumn" id="content" role="main">
                <?php query_posts("cat=-4,-5") ?>
                <?php if (have_posts()) : ?>

                  <?php while (have_posts()) : the_post(); ?>

                    <div class="post" id="post-<?php the_ID(); ?>">
                      <h5><a href="<?php the_permalink() ?>" class="body-item-link" rel="bookmark" title="Permanent Link to <?php the_title_attribute(); ?>"><?php the_title(); ?></a></h5>
                      <p class="body-item-date"><?php the_time('F jS, Y') ?></p><br /> 

                      <div class="post-body">
                        <?php the_content('Read the rest of this entry &raquo;'); ?>
                      </div>
            <p class="body-item-author">posted by <?php the_author() ?> at <?php the_time('H:i') ?></p>

                    </div>
                  <?php endwhile; ?>

                  <div class="navigation">
                    <div class="alignleft"><?php next_posts_link('&laquo; Older Entries') ?></div>
                    <div class="alignright"><?php previous_posts_link('Newer Entries &raquo;') ?></div>
                  </div>

                <?php else : ?>

                  <h2 class="center">Not Found</h2>
                  <p class="center">Sorry, but you are looking for something that isn't here.</p>
                  <?php get_search_form(); ?>
                <?php endif; ?>
        <?php wp_reset_query(); ?>
                </div>
            <br />
      <div class="sidebar">
        <div class="panel" id="nav">
            <ul role="navigation">
              <li><h4 class="sidebar-title">Pages</h4>
              <a title="News" href="http://mersthamdrama.org.uk/">News</a>          
              <?php wp_list_pages('title_li=' ); ?>
              </li>
            </ul>
        </div>
        <div class="panel" id="archive">
        <ul role="navigation">
          <li><h4 class="sidebar-title">Archives</h4>
            <ul>
            <?php wp_get_archives('type=monthly'); ?>
            </ul>
          </li>

        </ul>
      </div>
      <?php get_a_post(160); ?>
    <div class="panel" id="about">
      <p class="panel-item">
        <?php the_content('Read the rest of this entry &raquo;'); ?>
      </p>
    </div>
<?php 
  include("sidefooter.htm");
?>
            </div>
        </div>
<?php
  include("suffix.htm");
?>

<?php/* get_sidebar(); */ ?> 

<?php /* get_footer(); */ ?> 

Answer 1

I suggest you create a child theme so any theme updates will NOT overwrite your custom coding http://wordpresssites.net/themes/how-to-make-your-own-child-theme-for-wordpress-beginners-guide/