reportviewer - ssrs 2008

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C#

Hi,
I have created a ssrs report and managed to deploy it.
From the initernet explorer I can browse to the report.
I can select parameters and run the report.
Now I would like to view this report from windows form in vs 2010.

When I want to run view this report by running the winform code, the reportviwere comes up but there is a message which says:
The source of the report definition has not been specified.
How do I solve this please?
Thanks


This is the code to view the report:

this.reportViewer1.ServerReport.ReportServerUrl = new Uri(@"http://" + Common.MachineName + ":1234/ReportServer");            
this.reportViewer1.ServerReport.ReportPath = @"/Reports/" + _strReportName;

 Microsoft.Reporting.WinForms.ReportParameter[] RptParameter = new Microsoft.Reporting.WinForms.ReportParameter[1];
                RptParameter[0] = new Microsoft.Reporting.WinForms.ReportParameter("RequestID", "2");

 this.reportViewer1.RefreshReport();