Crystal Report With Error: A Number Range Is Required Here

I am using the crystal report, in that i am using code like below to show the SQL data into the crystal report,

string req = "{View_EODPumpTest.ROId} IN " + str + " AND " + "({View_EODPumpTest.RecordCreatedDate}>=date(" + fromDate.Year + " , " + fromDate.Month + " , " + fromDate.Day + ")" + "AND" + "{View_EODPumpTest.RecordCreatedDate}<=date(" + toDate.Year + " , " + toDate.Month + " ," + toDate.Day + " ))";
ReportDocument rep = new ReportDocument();
rep.Load(Server.MapPath("PumpTestReport.rpt"));
DateTime fromDate = DateTime.Parse(Request.QueryString["fDate"].ToString());
DateTime toDate = DateTime.Parse(Request.QueryString["tDate"].ToString());
CrystalReportViewer_PumpTest.ReportSource = rep;
//CrystalReportViewer1.SelectionFormula = str;
rep.RecordSelectionFormula = str;
CrystalDecisions.CrystalReports.Engine.TextObject from = ((CrystalDecisions.CrystalReports.Engine.TextObject)rep.ReportDefinition.ReportObjects["txtFrom"]);
from.Text = fromDate.ToShortDateString();
CrystalDecisions.CrystalReports.Engine.TextObject to = ((CrystalDecisions.CrystalReports.Engine.TextObject)rep.ReportDefinition.ReportObjects["txtTO"]);
to.Text = toDate.ToShortDateString();
//Session["Repo"] = rep;
CrystalReportViewer_PumpTest.RefreshReport();

after running my application it executes fine with no exception but such error i am getting, A number range is required here. Error in File

C:DOCUME~1DelmonLOCALS~1TempPumpTestReport {14E557A7-51B3-4791-9C78-B6FBAFFBD87C}.rpt: Error in formula . '{View_EODPumpTest.ROId} IN ['15739410','13465410'] AND ({View_EODPumpTest.RecordCreatedDate}>=date(2010 , 12 , 1)AND{View_EODPumpTest.RecordCreatedDate}<=date(2010 , 12 ,25 ))' A number range is required here. error.