title: ScrollPane doesn't work with dynamic content in as3
body: <pre><code>scrollPane.setSize(400,400);
  scrollPane.source=emptyc;
  </code></pre>
  
  <p>Where emptyc is a container in which I add content dynamically (i.e. by addChild method) doesn't work. It simply doesn't scroll at all.</p>
  
  <p>Neither does work if I add content using scrollPane as a container itself (i.e.:</p>
  
  <pre><code>scrollPane.addChild(myChild);
  </code></pre>