How To Render The PDF Report In SQL Server 2005

We have written a C# program in which we want to execute a SQL Report and return the report as a PDF

When we execute our code we get a message that System.Web.Services.Protocols.SoapException: The item '/production/Sudhir' cannot be found. --->
What Is syntax for ReportExecutionService.render(string report)
How do we define the string report?

ReportService.ReportingService rs = new ReportService.ReportingService();

rs.Credentials = System.Net.CredentialCache.DefaultCredentials;

Byte[] result;

string encoding;
string mimetype;
//ParameterCollection[] parametersUsed = null;

ParameterValue[] parametersUsed = null;
Warning[] warnings = null;
string[] streamids;

result = rs.Render("/production/Sudhir", "PDF", null, null, null, null, null, out encoding, out mimetype, out parametersUsed, out warnings, out streamids);

//System.Web.Services.h Response.ClearContent();
Response.AppendHeader("content-length", result.Length.ToString());
Response.ContentType = "application/pdf";
Response.BinaryWrite(result);
Response.Flush();
Response.Close();