PHP Code für letzte Beiträge geht plötzlich nicht mehr

<?php
    $sql = "SELECT
                post_name,
                DATE_FORMAT(post_date_gmt, '%d. %m %Y') as post_date_gmt,
                post_title,
                post_content,
                post_excerpt
            FROM
                wp3__posts
            WHERE
                post_type = 'post' 
              AND
              post_status = 'publish'


            ORDER BY
                post_date DESC
            LIMIT
                5
           ";
?> 


 <?php
    $result = mysql_query($sql);
    $blogpath = "http://cabinet-of-curiosities.de/";
    $excerpt = "";
    if(mysql_num_rows($result)){
                echo "<ul>\n";
        while($row = mysql_fetch_assoc($result)){
            // Falls Auszuge vorhanden wird dieser genommen,
            // ansonsten eine Kurzversion des Inhalts
            if(trim($row['post_excerpt']) == "")
                $excerpt = substr(strip_tags($row['post_content']),0,160)."..."; 
            else
                $excerpt = strip_tags($row['post_excerpt']);
            echo "<li>".
                 "<a href=\"".$blogpath.$row['post_name']."/\" ".
                 "title=\"".$excerpt."\">".
                 $row['post_title'].
                 "</a> ".
                 "</li>";
        }
        echo "</ul>";
    }
?>