title: XCODE Base SDK Missing
body: <p>I have a application built on IOS 4.1 but recently I have upgraded my XCODE to 3.2.6 which supports IOS 4.3. </p>
  
  <p>How can I run this application in this XCODE. All I am seeing is the "Base SDK Missing" message even though I am choosing the deployment target SDK as 4.1.</p>
  
  <p>Please suggest.  </p>