I'm having an issue installing on my device, I get the following error:

Saving IPA ...
... Writing updated Info.plist
Opening source executable...
... Initial signature step
IPP ERROR: Application exception: System.Security.Cryptography.CryptographicExceptio n: Keyset does not exist
at System.Security.Cryptography.Pkcs.PkcsUtils.Create SignerEncodeInfo(CmsSigner signer, Boolean silent)
at System.Security.Cryptography.Pkcs.SignedCms.Sign(C msSigner signer, Boolean silent)
at System.Security.Cryptography.Pkcs.SignedCms.Comput eSignature(CmsSigner signer, Boolean silent)
at MachObjectHandling.CodeDirectorySignatureBlob.Sign CodeDirectory(X509Certificate2 SigningCert, DateTime SigningTime, CodeDirectoryBlob CodeDirectory)
at iPhonePackager.CodeSignatureBuilder.PerformSigning ()
at iPhonePackager.CookTime.RepackageIPAFromStub()
at iPhonePackager.Program.Main(String[] args)
Program exited with return code 1
Not sure what the issue here is- I don't think it has anything to do with my certificates- they should be fine.