error when creating a certificate

[valgeo]

I get an error when creating the certificate:
A public/private key pair is required to generate a signing request (failed to find or open specified key pair file)
can you help me?

[3Danimator]

Hi Valgeo

It happens on PC /Unreal iOS Config. Wizard/ or Mac OS /Xcode, Keychain/ ?
You progressed by .......?

http://udn.epicgames.com/Three/Apple...ningSetup.html