title: Magento 1.7 Admin Login Fatal error: Call to a member function getBlockName() on a non-object in line 43
body: <p>Can someone help me?</p>
  
  <p>On <code>index.php/admin</code> the following exception was thrown:</p>
  
  <pre><code>Fatal error: Call to a member function getBlockName() on a non-object in /home/ahorraen/public_html/app/code/core/Mage/Captcha/Block/Captcha.php on line 43
  </code></pre>