title: Magento up-sell block not displaying
body: <p>I need to display the up-sell block in my product page.
  Currently, I have the following code at the bottom of the file <code>template/catalog/product/view.phtml</code>: </p>
  
  <pre><code>&lt;?php echo $this-&gt;getChildHtml('upsell_products') ?&gt;
  </code></pre>
  
  <p>I have successfully set products in the CMS, and have disabled all caches.
  Does anyone have any idea?
  Thanks in advance.</p>