crystal,report blank

hi ive a crystal report which loads using the code beloew... the report is showing all blank except the parameter values... plz help...

Code:

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            ReportDocument cryRpt = new ReportDocument();
            //cryRpt.Load("C:\\Documents and Settings\\Vaibhav\\Desktop\\powertech\\report2.rpt");

            cryRpt.Load("E:\\powertech\\crystalreport1.rpt");
            cryRpt.Load("E:\\powertech\\crystalreport1.rpt");
 
          //cryRpt.Load("C:\\Documents and Settings\\admin\\Desktop\\powertech\\Report2.rpt");
            //cryRpt.Load("H:\\powertech\\Report2.rpt"); 
          TableLogOnInfos crtableLogoninfos = new TableLogOnInfos();
            TableLogOnInfo crtableLogoninfo = new TableLogOnInfo();
            ConnectionInfo crConnectionInfo = new ConnectionInfo();
            Tables CrTables;

            ParameterFieldDefinitions crParameterFieldDefinitions ;
            ParameterFieldDefinition crParameterFieldDefinition ;
            ParameterValues crParameterValues = new ParameterValues();
            ParameterDiscreteValue crParameterDiscreteValue = new ParameterDiscreteValue();
           
            crParameterDiscreteValue.Value = cmbChallanno.Text  ;
            crParameterFieldDefinitions = cryRpt.DataDefinition.ParameterFields;
            crParameterFieldDefinition = crParameterFieldDefinitions["invno"];
            crParameterValues = crParameterFieldDefinition.CurrentValues;
           
            crParameterValues.Clear();
            crParameterValues.Add(crParameterDiscreteValue);
            crParameterFieldDefinition.ApplyCurrentValues(crParameterValues);

            crParameterDiscreteValue.Value = cmbCustname.Text;
            crParameterFieldDefinitions = cryRpt.DataDefinition.ParameterFields;
            crParameterFieldDefinition = crParameterFieldDefinitions["custName"];
            crParameterValues = crParameterFieldDefinition.CurrentValues;


            crParameterValues.Add(crParameterDiscreteValue);
            crParameterFieldDefinition.ApplyCurrentValues(crParameterValues);

            //crConnectionInfo.ServerName = "YOUR SERVERNAME";
            //crConnectionInfo.DatabaseName = "DATABASE NAME";
            //crConnectionInfo.UserID = "USERID";
            //crConnectionInfo.Password = "PASSWORD";

            //CrTables = cryRpt.Database.Tables;
            //foreach (CrystalDecisions.CrystalReports.Engine.Table CrTable in CrTables)
            //{
            //    crtableLogoninfo = CrTable.LogOnInfo;
            //    crtableLogoninfo.ConnectionInfo = crConnectionInfo;
            //    CrTable.ApplyLogOnInfo(crtableLogoninfo);
            //}
          crystalReportViewer1.ReportSource = cryRpt;
            crystalReportViewer1.Refresh();

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it might help if you ask vb questions in the vb forum + c# questions in the c# forum