X509Certificate2.HasPrivateKey = true, but no PrivateKey?

[Dominik Amon]

Hi,

I have a X509 certifikate, with public- and privatekey.
For test reasons, I programed a small Consoleapplicat ion, which executes
with my user rights (Administrator) .

When I am reading an X509Certificate , the property HasPrivateKey of the
X509Certificate 2 is set to "true". I can also check the publickey

But if I want to use the PrivateKey Property, after a while i get the error
message "Keyset does not exist",

That's the stacktrace for it:
bei System.Security .Cryptography.U tils.CreateProv Handle(CspParam eters
parameters, Boolean randomKeyContai ner)\r\n bei
System.Security .Cryptography.U tils.GetKeyPair Helper(CspAlgor ithmType
keyType, CspParameters parameters, Boolean randomKeyContai ner, Int32
dwKeySize, SafeProvHandle& safeProvHandle, SafeKeyHandle& safeKeyHandle)\ r\n
bei System.Security .Cryptography.R SACryptoService Provider.GetKey Pair()\r\n
bei System.Security .Cryptography.R SACryptoService Provider..ctor( Int32
dwKeySize, CspParameters parameters, Boolean useDefaultKeySi ze)\r\n bei
System.Security .Cryptography.R SACryptoService Provider..ctor( CspParameters
parameters)\r\n bei
System.Security .Cryptography.X 509Certificates .X509Certificat e2.get_PrivateK ey()\r\n
bei SecurityHelper. SignatureHelper .FindCertificat e(CertificateId entification
certIdentificat ion, String certAttributeDa ta) in D:\\DATEN\\Amon D\\Visual
Studio
2005\\Projects\ \ConsoleApplica tion1\\ConsoleA pplication1\\Si gnatureHelper.c s:Zeile
120.

I don't have a plan, what's the reason? :-(

Thanks,
Dominik