Error during login to IFS Applications

Following error description appears...What could be the fix for the problem.(IFS Applications 9.0)

Ifs.Fnd.FndSystemException: Unexpected error while calling server method ClientApplication/IdentifyCurrentUser

 Ifs.Fnd.AccessProvider.FndConnection.InvokeInternal(String intface, String operation, Object requestBody, Object responseBody, FndRequestContext requestContext, Boolean forcedSync)
kohteessa Ifs.Fnd.AccessProvider.Interactive.FndLoginDialog.AuthenticateCredentials(FndLoginCredentials loginCreds, Boolean isWIA) ---> System.Net.WebException: Pyyntö keskeytettiin: Toiminto aikakatkaistiin.
 Ifs.Fnd.AccessProvider.FndConnection.HandleHttpStatusErrors(HttpWebResponse result, Exception innerException)
 Ifs.Fnd.AccessProvider.FndConnection.GetResponseWithoutPersistencyHandler(String intface, String operation, FndRequestContext requestContext, FndManualDecisionCollection decisions, Byte[] requestHeaderBytes, Byte[] requestBodyBytes)
 Ifs.Fnd.AccessProvider.FndConnection.GetResponse(String intface, String operation, FndRequestContext requestContext, FndManualDecisionCollection decisions, Byte[] requestHeaderBytes, Byte[] requestBodyBytes, FndApfAsyncInvoke asyncInvokeHandle)
 Ifs.Fnd.AccessProvider.FndConnection.CallGetResponse(String intface, String operation, FndRequestContext requestContext, FndManualDecisionCollection decisions, Byte[] requestHeaderBytes, Byte[] requestBodyBytes, FndApfAsyncInvoke asyncInvokeHandle)
 Ifs.Fnd.AccessProvider.FndConnection.InvokeGetResponse(String intface, String operation, FndRequestContext requestContext, FndManualDecisionCollection decisions, Byte[] requestHeaderBytes, Byte[] requestBodyBytes, Boolean& abandoned, Boolean forcedSync)
 Ifs.Fnd.AccessProvider.FndConnection.InvokeInternal(Object requestBody, Object responseBody, String intface, String operation, FndRequestContext requestContext, FndManualDecisionCollection decisions, Boolean forcedSync)