title: Fatal error: Class 'Varien_Data_Form_Element_Weight' not found In magento
body: <p>I have a fresh installation of magento 1.8</p>
  
  <p>I have created a category called 'TEST'</p>
  
  <p>when I want to add a Product in 'Simple Products' Then I get the following Error.</p>
  
  <p>Fatal error: Class 'Varien_Data_Form_Element_Weight' not found in C:\xampp\htdocs\testmag\lib\Varien\Data\Form\Abstract.php on line 147</p>
  
  <p>I realy don't Understand whats the reason
  if I add my product in other types like 'Grouprd Products' or 'Virtual Products' Then i get no error and every thing goes fine.</p>
  
  <p>Any help appreciated.  </p>