I am trying to use the ServerOperations.Login() method but get the following stacktrace. Can you tell me what status code 1025 is?
Client Version: 2.0.2.18753 -- yes it is very old

Thanks for your help.
Unhandled Exception: System.Exception: The server returned an unknown status code (1025). ---> System.Web.Services.Protocols.SoapException: 1025 : FailVaultClientCantConnectToFortress
at System.Web.Services.Protocols.SoapHttpClientProtocol.ReadResponse(SoapClientMessage message, WebResponse response, Stream responseStream, Boolean asyncCall)
at System.Web.Services.Protocols.SoapHttpClientProtocol.Invoke(String methodName, Object[] parameters)
at VaultClientNetLib.ClientService.VaultService.ValidateServiceVersions(Int32[] clientSupportedVersions)
at VaultClientNetLib.VaultConnection.Login(String strURLBase, String strUserLogin, String strPassword)
at VaultClientOperationsLib.ClientInstance.Login(String urlbase, String username, String password)
at VaultClientIntegrationLib.ServerOperations.Login(AccessLevelType altCommand, Boolean bAllowAuto, Boolean bSaveSession)
--- End of inner exception stack trace ---
at VaultClientIntegrationLib.ServerOperations.Login(AccessLevelType altCommand, Boolean bAllowAuto, Boolean bSaveSession)
at VaultClientIntegrationLib.ServerOperations.Login()