title: Missing private key iphone developer in keychain
body: <p>I'm trying to run an application on my iPhone, but I'm having problems with the code signing identity.
  Actually I have two certificate in my keychains, one for the distribution, and one for developing that does not have the private key.
  I tried to download again the certificate from <a href="http://developer.apple.com" rel="noreferrer">developer.apple.com</a> but I still can't have the private key.
  In fact I can't select the iPhone developer profile from <em>Target -> Build settings -> Code signing Identity</em> because I get the error:<br></p>
  
  <blockquote>
    <p>Profile doesn't match any valid certificate/private key pair in your
    keychains.</p>
  </blockquote>
  
  <p>Moreover in the organizer the status of the developer profile is:</p>
  
  <blockquote>
    <p>Valid signing identity not found.</p>
  </blockquote>
  
  <p>Do you have any suggestion?</p>