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?

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?