Error while packaging game for Mac App Store

[bluekylin]

This is the log of Unreal Frontend:

MacP WARNING: Failed to copy file to 'O:\UDK\UDK-2011-12\UDKGame\Build\Mac\Mac-Deploy\Shipping\MyGame.app\Contents\_CodeSignature\CodeResources'
MacP WARNING: Exception: Could not find a part of the path 'O:\UDK\UDK-2011-12\UDKGame\Build\Mac\Mac-Deploy\Shipping\UDKGame-Mac-Shipping.app\Contents\_CodeSignature\CodeResources '. (going to retry copy)
MacP WARNING: Failed to copy file to 'O:\UDK\UDK-2011-12\UDKGame\Build\Mac\Mac-Deploy\Shipping\MyGame.app\Contents\_CodeSignature\CodeResources'
MacP WARNING: Exception: Could not find a part of the path 'O:\UDK\UDK-2011-12\UDKGame\Build\Mac\Mac-Deploy\Shipping\UDKGame-Mac-Shipping.app\Contents\_CodeSignature\CodeResources '. (going to retry copy)
MacP WARNING: Failed to copy file to 'O:\UDK\UDK-2011-12\UDKGame\Build\Mac\Mac-Deploy\Shipping\MyGame.app\Contents\_CodeSignature\CodeResources'
MacP WARNING: Exception: Could not find a part of the path 'O:\UDK\UDK-2011-12\UDKGame\Build\Mac\Mac-Deploy\Shipping\UDKGame-Mac-Shipping.app\Contents\_CodeSignature\CodeResources '. (going to retry copy)
MacP WARNING: Failed to copy file to 'O:\UDK\UDK-2011-12\UDKGame\Build\Mac\Mac-Deploy\Shipping\MyGame.app\Contents\_CodeSignature \CodeResources'
MacP WARNING: Exception: Could not find a part of the path 'O:\UDK\UDK-2011-12\UDKGame\Build\Mac\Mac-Deploy\Shipping\UDKGame-Mac-Shipping.app\Contents\_CodeSignature\CodeResources '. (going to retry copy)
MacP WARNING: Failed to copy file to 'O:\UDK\UDK-2011-12\UDKGame\Build\Mac\Mac-Deploy\Shipping\MyGame.app\Contents\_CodeSignature\CodeResources'
MacP WARNING: Exception: Could not find a part of the path 'O:\UDK\UDK-2011-12\UDKGame\Build\Mac\Mac-Deploy\Shipping\UDKGame-Mac-Shipping.app\Contents\_CodeSignature\CodeResources '. (going to retry copy)
MacP ERROR: Failed to copy file to O:\UDK\UDK-2011-12\UDKGame\Build\Mac\Mac-Deploy\Shipping\MyGame.app\Contents\_CodeSignature\CodeResources and there are no more retries!
MacP ERROR: Application exception: System.Security.Cryptography.CryptographicException: The system cannot find the file specified.
at System.Security.Cryptography.CryptographicException.ThrowCryptographicException(Int32 hr)
at System.Security.Cryptography.X509Certificates.X509 Utils._QueryCertFileType(String fileName)
at System.Security.Cryptography.X509Certificates.X509 Certificate.LoadCertificateFromFile(String fileName, Object password, X509KeyStorageFlags keyStorageFlags)
at MacPackager.CodeSignatureBuilder.InstallCertificates(List`1 CertFilenames)
at MacPackager.CodeSignatureBuilder.PrepareForSigning ()
at MacPackager.CompileTime.PackageApp()
at MacPackager.Program.Main(String[] args)

COMMANDLET 'MacPackager.exe PackageMAS UDKGame Shipping INT' FAILED

What's the CodeResources? How to resolve it?