title: Missing [mx.rpc]::IResponder
body: <p>I'm trying to use the Flex 4 SDK's mx.rpc package in a Flash application.
  I imported Flex's rpc.swc (Adobe\Adobe Flash Builder 4\sdks\4.0.0\frameworks\libs\rpc.swc) into my project by adding it to the list in Flash's "Publish Settings/Flash/ActionScrip 3.0 Settings/Library Path". It seems like I have access to the classes, however when I compile I get this error:</p>
  
  <pre><code>1046: Type was not found or was not a compile-time constant: [mx.rpc]::IResponder.
  </code></pre>
  
  <p>There's no location or line for the error either. Any idea how to get this to work? TIA!</p>
  
  <p>Notes:
  I'm using Flash Builder 4 and Flash CS5</p>