I made myself a very simplistic testimonials sidebox, but I'm having trouble pulling anything from the database. Whenever I try code to execute a DB query, the site simply stops loading at that point. I've tried it a few different ways, but this is basically what I'm trying:

Code:
<?php
 // testimonials sidebox

  $content = '';
  $content .= '<div id="' . str_replace('_', '-', $box_id . 'Content') . '" class="sideBoxContent">';

  $content .= $db->Execute("SELECT testimonials_text FROM testimonials ORDER BY RAND() LIMIT 1");

  $content .= '</div>';
?>
If I put plain text in place of the DB select statement, it displays fine. Seems like this should be pretty simple; any ideas what I'm missing?