sql server reporting services 2005 401 error

I am getting the following error when trying to run reports. any thoughts or comments?

Error Message The request failed with HTTP status 401: Unauthorized.

Page ASP.testreports_aspx

Source Microsoft.ReportViewer.Common : System.String[] GetSecureMethods()

Stack Trace at Microsoft.SqlServer.ReportingServices2005.Execution.RSExecutionConnection.GetSecureMethods() at Microsoft.SqlServer.ReportingServices2005.Execution.RSExecutionConnection.IsSecureMethod(String methodname) at Microsoft.SqlServer.ReportingServices2005.Execution.RSExecutionConnection.LoadReport(String Report, String HistoryID) at Microsoft.Reporting.WebForms.ServerReport.GetExecutionInfo() at Microsoft.Reporting.WebForms.ServerReport.SetParameters(IEnumerable`1 parameters) at CFAUI.WebForms.CFAPreview.Page_Load(Object sender, EventArgs e) in C:\test\testapp\AUI\WebForms\testPreview.aspx.cs:line 31 at System.Web.Util.CalliHelper.EventArgFunctionCaller(IntPtr fp, Object o, Object t, EventArgs e) at System.Web.Util.CalliEventHandlerDelegateProxy.Callback(Object sender, EventArgs e) at System.Web.UI.Control.OnLoad(EventArgs e) at System.Web.UI.Control.LoadRecursive() at System.Web.UI.Page.ProcessRequestMain(Boolean includeStagesBeforeAsyncPoint, Boolean includeStagesAfterAsyncPoint)

User ID

May I know if its just 开发者_开发问答a configuration issue and a possible cause for the same. Any help would be appreciated?

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It's an IIS issue on the directory security for the virtual folders or parent site.

In several ways, for example, are you connecting from non-windows but Integrated Auth is set?