title: Magento 1.9 Change Layout Columns
body: <p>I want to change the "<code>/checkout/onepage/success/</code>" layout from 
  2-Colunms with a left Aside Block to a 1-Column-layout.</p>
  
  <p>I tried to change it in:</p>
  
  <pre><code>app/design/frontend/base/layout/checkout.xml
  
  app/design/frontend/rwd/default/layout/checkout.xml
  </code></pre>
  
  <p>but nothing changed. Yes I've cleared the cache!</p>
  
  <p>In Backend "System -> Configuration -> Design -> Actual Package" "<strong>rwd</strong>" is in use" Translation, Layout, Skin are empty. Standard is "default".</p>
  
  <p>Please help!</p>