访问证书时出错:密钥集不存在

我最近更新了两个windows控制台应用程序的证书。在过去，我们只是更新了证书，但这次不可能，因为我们的第三方提供商不再允许这样做。这一次创建了一个名称稍作修改的新证书。两个使用此证书的应用程序，一个正常工作，另一个每次运行时都得到以下错误。

Exception (CryptographicException)
System.Security.Cryptography.CryptographicException: Keyset does not exist 
Server stack trace: 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() at 
System.IdentityModel.Tokens.X509AsymmetricSecurityKey.GetSignatureFormatter(String algorithm) at 
System.IdentityModel.SignedXml.ComputeSignature(SecurityKey signingKey) at 
System.ServiceModel.Security.WSSecurityOneDotZeroSendSecurityHeader.CompletePrimarySignatureCore(SendSecurityHeaderElement[] signatureConfirmations, SecurityToken[] signedEndorsingTokens, SecurityToken[] signedTokens, SendSecurityHeaderElement[] basicTokens) at 
System.ServiceModel.Security.SendSecurityHeader.CompleteSignature() at 
System.ServiceModel.Security.SendSecurityHeader.CompleteSecurityApplication() at 
System.ServiceModel.Security.SecurityAppliedMessage.OnWriteMessage(XmlDictionaryWriter writer) at 
System.ServiceModel.Channels.BufferedMessageWriter.WriteMessage(Message message, BufferManager bufferManager, Int32 initialOffset, Int32 maxSizeQuota) at 
System.ServiceModel.Channels.TextMessageEncoderFactory.TextMessageEncoder.WriteMessage(Message message, Int32 maxMessageSize, BufferManager bufferManager, Int32 messageOffset) at 
System.ServiceModel.Channels.HttpOutput.SerializeBufferedMessage(Message message) at System.ServiceModel.Channels.HttpOutput.Send(TimeSpan timeout) at 
System.ServiceModel.Channels.HttpChannelFactory.HttpRequestChannel.HttpChannelRequest.SendRequest(Message message, TimeSpan timeout) at 
System.ServiceModel.Channels.RequestChannel.Request(Message message, TimeSpan timeout) at 
System.ServiceModel.Channels.SecurityChannelFactory`1.SecurityRequestChannel.Request(Message message, TimeSpan timeout) at 
System.ServiceModel.Channels.ServiceChannel.Call(String action, Boolean oneway, ProxyOperationRuntime operation, Object[] ins, Object[] outs, TimeSpan timeout) at 
System.ServiceModel.Channels.ServiceChannelProxy.InvokeService(IMethodCallMessage methodCall, ProxyOperationRuntime operation) at 
System.ServiceModel.Channels.ServiceChannelProxy.Invoke(IMessage message) 
Exception rethrown at [0]: at 
System.Runtime.Remoting.Proxies.RealProxy.HandleReturnMessage(IMessage reqMsg, IMessage retMsg) at 
System.Runtime.Remoting.Proxies.RealProxy.PrivateInvoke(MessageData& msgData, Int32 type)

我已将证书加载到适当的证书存储区。我给了用户完全的访问权限。我已经给了"每个人"访问证书的权限。我甚至已经确定了物理文件与私人，并给予用户完全控制。还是没有成功。

下面是配置文件的摘录，它设置了访问证书的配置:

<clientCertificate
      findValue="certifcatesubjectishere"
      storeLocation="LocalMachine"
      storeName="TrustedPeople"
      x509FindType="FindBySubjectName"
      />