Hi, I am using Microsoft.ReportViewer.WebForms ver 8.0 to display rdl reports in a web page. I'm using VS 2005 with service pack 1. I set ReportServerCredentials using a custom class that implements IReportServerCredentials. It exposes NetworkCredentials using a valid admin user account. I am setting report parameters from code as: ReportViewer1.ServerReport.SetParameters(parameters) I find that when I run the page with reportserver credentials set, the parameters are not passed to the report and I get an error message, "Parameter, XXX is missing a value". I can see what parameters were sent by setting ShowParameterPromptsto True. When I remove the credential settings,the parameter values do get set but the report throws the following error on execution: Execution '2su5vg55juj253455rodai55' cannot be found I have checked that my web project is using Kerberos authentication and not NTLM. Has anybody faced a problem like this? I would appreciate any help. Thanks Supriya

I know that this is a couple years after the fact, but this issue still exists with SSRS 2008 and VS 2008. I didn't find an answer on any of the sites, but I started to think that maybe the control itself is bugged, and I was right. The work-around for this is to: Set ReportViewer.ServerReport.ReportServerCredentials, and then Use ReportViewer.ServerReport.SetParameters(paramList). It appears that setting the credentials clears the parameters.