Keyset does not exist.

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C#

security

MVC4

ASP.NET4

Hi ,
When i create self-signed certificate from IIS and Import on cmm Personal and trusted level directory .
after when i run my application then i get a error .

System.Security.Cryptography.CryptographicException: Keyset does not exist.
at System.Security.Cryptography.Utils.CreateProvHandle(CspParameters parameters, Boolean randomKeyContainer)
   at System.Security.Cryptography.Utils.GetKeyPairHelper(CspAlgorithmType keyType, CspParameters parameters, Boolean randomKeyContainer, Int32 dwKeySize, SafeProvHandle& safeProvHandle, SafeKeyHandle& safeKeyHandle)
   at System.Security.Cryptography.RSACryptoServiceProvider.GetKeyPair()
   at System.Security.Cryptography.X509Certificates.X509Certificate2.get_PrivateKey()
   at System.IdentityModel.Tokens.X509AsymmetricSecurityKey.get_PrivateKey()

<code>My Code is  This :
protected void SecureLoginButtonClick(object sender, EventArgs e)
{
string action = Request.QueryString[WSFederationConstants.Parameters.Action];

try
{
if (action == WSFederationConstants.Actions.SignIn)
{
// Process signin request.
SignInRequestMessage requestMessage = (SignInRequestMessage)WSFederationMessage.CreateFromUri(Request.Url);

if (WebHelper.IsAuthenticatedUser)
{
SecurityTokenService sts = new CustomSecurityTokenService(CustomSecurityTokenServiceConfiguration.Current);
SignInResponseMessage responseMessage = FederatedPassiveSecurityTokenServiceOperations.ProcessSignInRequest(requestMessage, User, sts);
FederatedPassiveSecurityTokenServiceOperations.ProcessSignInResponse(responseMessage, Response);
}
else
{
throw new UnauthorizedAccessException();
}
}
else
{
Response.Redirect("~/" + Constants.LoginPageName + SessionInfo.RedirectUrl);
}
}
catch (UnauthorizedAccessException exception)
{
Errorlog.AddException(exception.ToString());
Response.Redirect("~/" + Constants.LoginPageName + SessionInfo.RedirectUrl);
}
catch (ThreadAbortException ex)
{
}
catch (Exception exception)
{
Errorlog.AddException(exception.ToString());
throw;
}
}</code>