title: iOS 5.1 and Xcode 4.3.1 CodeSign Error
body: <p>I just downloaded the iOS 5.1 and the Xcode 4.3.1. But when I'm going to test in my device, the Xcode give me the error:</p>
  
  <blockquote>
    <p>CodeSign error: code signing is required for product type 'Application' in SDK 'iOS 5.1'</p>
  </blockquote>
  
  <p>Any idea how to fix it?</p>