Also it seem that some project preferences did not copy correctly. So, after importing the keys, I had to check the menu “Edit Project Setting” -> “Build” tab -> “Code Signing identity”. Also my info.plist file had to be reviewed, some variables are managed by Xcode so I had to reset it in order use the same application profile.

If this can help others…

Also, I only exported the private key (.p12 file), NOT the public key (.PEM file), Is this wrong?

Yep, that’s most likely the crux of the matter. You must import your private (P12) und public key (PEM) ’cause both keys form the so-called “valid signing identity”.

WHY DOES IT HAVE TO BE SOOOOO COMPLICATED?

That’s right! In many cases developing for other (mobile) platforms is not that tricky.

– Stephan

I did as you suggest, but still get the error.(Not the warning, though)

In “Organizer/iPhone Development/Provisioning Profiles”, the yellow tab says “A valid signing identity matching this profile could not be found in your keychain.”

In Keychain Access, the Certificate appears under “Certificates” and the Key appears under “Keys”, but they don’t seem to be linked together: None of them show disclosure triangles.
(I have another Certificate/Key for MobileMe and these DO show each other on disclosure).

Also, I only exported the private key (.p12 file), NOT the public key (.PEM file), Is this wrong? Now it’s weekend and I’m at home, I am stuck to iPhone Simulator until monday…

WHY DOES IT HAVE TO BE SOOOOO COMPLICATED?

What did I do against Apple? (laughs, anyone?)

Figuring out -viewDidUnload and -didReceiveMemoryWarning was a lot easier…