title: iPhone Developer Portal won't accept my CSR
body: <p>I am using the Development Provisioning Assistant in the iPhone Developer Portal, but when I get to the part where it asks me to generate and upload my CSR, I try to upload it and it just gives me this error:</p>
  
  <p>The CSR selected is invalid. Please check the file and try again.</p>
  
  <p>Does anyone know what this means or what I can do about it?? Thanks!</p>