Xcode - iPhone - profile doesn't match any valid certificate-/private-key pair in the default keychain

Question

I tried to add my iPhone to Xcode4 to test my Application on it. I added the device in the Apple Developer-Center and downloaded the Provision-Profile. We pay 99$ per month

Answer 1

My problem was my Target profile didn't have the proper code signing option selected:

Target Menu -> Code Signing -> Code Signing Identity

Choose "iPhone developer" then select the provisional profile you created.