SSRS 2008 - HTTP Status 401: Unauthorized

Question

I have a WPF application which is hosting a SSRS 2008 ReportView via a WindowsFormsHost control.  I am trying to connect to a remote server to run a report, but I receive the following error:
{"The request failed with HTTP status 401: Unauthorized."}
    [System.Net.WebException]: {"The request failed with HTTP status 401: Unauthorized."}
    Data: {System.Collections.ListDictionaryInternal}
    HelpLink: null
    InnerException: null
    Message: "The request failed with HTTP status 401: Unauthorized."
    Source: "Microsoft.ReportViewer.Common"
    StackTrace: "   at Microsoft.SqlServer.ReportingServices2005.Execution.RSExecutionConnection.GetSecureMethods()
   at Microsoft.SqlServer.ReportingServices2005.Execution.RSExecutionConnection.IsSecureMethod(String methodname)
   at Microsoft.SqlServer.ReportingServices2005.Execution.RSExecutionConnection.SetConnectionSSLForMethod(String methodname)
   at Microsoft.SqlServer.ReportingServices2005.Execution.RSExecutionConnection.ProxyMethodInvocation.Execute[TReturn](RSExecutionConnection connection, ProxyMethod`1 initialMethod, ProxyMethod`1 retryMethod)
   at Microsoft.SqlServer.ReportingServices2005.Execution.RSExecutionConnection.LoadReport(String Report, String HistoryID)
   at Microsoft.Reporting.WinForms.ServerReport.EnsureExecutionSession()
   at Microsoft.Reporting.WinForms.ServerReport.GetDataSources(Boolean& allCredentialsSet)
   at Microsoft.Reporting.WinForms.RSParams.GetDataSources(Boolean& allSatisfied)
   at Microsoft.Reporting.WinForms.RSParams.EnsureParamsLoaded(Boolean forceCredentialsShown, ReportParameterInfoCollection parameterInfos)
   at Microsoft.Reporting.WinForms.RSParams.EnsureParamsLoaded()
   at Microsoft.Reporting.WinForms.ReportViewer.RenderReportWithNewParameters(Int32 pageNumber)"
    TargetSite: {System.String[] GetSecureMethods()}
Here's my environment:
I have a Windows 2008 Server running SQL Server 2008.  This server is a virtual machine running on Hyper-V in a Virtual Private LAN and I'm using RAAS to route traffic to this virtual via a static IP.  
I'm passing NetworkCredentials to the report for a user that can access and run reports.  I can prove this by logging in to the report server via a browser with these same credentials.
var report = reportViewer.ServerReport;
report.ReportServerCredentials.NetworkCredentials =
new NetworkCredential("MACHINE-NAME\\USER","Password");
 Anyway, I've tried everything, short of disabling authentication altogether.  Has anyone experienced authentication issues with ssrs in a hosted / virtual environment?
Any help would be greatly appreciated.
Thanks

Answer 1

I need help pls, I have the same problem error 401 etc...
I implement all solution in this page and nothing..
Help me pls.
stringurlReportServer =
ReportViewer1.ProcessingMode =
ProcessingMode.Remote;
// ProcessingMode will be Either Remote or Local
                ReportViewer1.ShowExportControls =
true;
                ReportViewer1.ShowPrintButton =
true;
                ReportViewer1.ServerReport.ReportServerUrl =
newUri(urlReportServer);
//Set the ReportServer Url
                ReportViewer1.ServerReport.ReportPath =
"/Reportes/"+ ReportName;
//Passing the Report Path               
IReportServerCredentialsirsc =
newCredencialesReporting("******",
                ReportViewer1.ServerReport.ReportServerCredentials = irsc;
                ReportViewer1.ServerReport.Refresh();
                ReportViewer1.Visible =
true;
///<summary>
///</summary>
string_usuario, _password, _dominio;
publicCredencialesReporting(stringuserName,
stringpassword,
stringdomain)
_usuario = userName;
_password = password;
            _dominio = domain;
publicSystem.Security.Principal.WindowsIdentityImpersonationUser
get
returnnull;
publicSystem.Net.ICredentialsNetworkCredentials
get
returnnewNetworkCredential(_usuario,
_password, _dominio);
///<summary>
///</summary>
///<param
name="authCoki"></param>
///<param
name="userName"></param>
///<param
name="password"></param>
///<param
name="authority"></param>
///<returns></returns>
//public bool GetFormsCredentials(out System.Net.Cookie authCoki, out string userName, out string password, out string
authority)
//    userName = _usuario;
//    password = _password;
//    authority = _dominio;
//    authCoki = new System.Net.Cookie(".ASPXAUTH", ".ASPXAUTH", "/", "Domain");
//    return true;
publicboolGetFormsCredentials(outSystem.Net.CookieauthCookie,
outstringuser,
outstringpassword,
outstringauthority)
// Do not use forms credentials to authenticate.
            authCookie =
null;
            user = password = authority =
null;
returnfalse;