reporting issue in telerik

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Telerik

hy frens, i have this problem. I am trying generate report using telerik reporting and I did something like this but i cannot find any data in the report viewer. Here is what i have done.

1. created a page where there is button and controls to pass parameters

protected void cmdGenerateReport_Click(object sender, EventArgs e)
    {

var cpr = new BP_Example.rptExample();

InstanceReportSource rptSource = new InstanceReportSource();
rptSource.ReportDocument = cpr;

cpr.ReportParameters["FromDate"].Value = "1/1/2012";
cpr.ReportParameters["ToDate"].Value = "12/1/2012";
cpr.ReportParameters["ID"].Value = 1234;
cpr.ReportParameters["CurrencyTo"].Value = "USD";




rptExample.ReportSource = rptSource;
rptExample.RefreshReport();
}



2. in the telerik reporting page i have done something like this

namespace BP_RevenueByAdvertiser
{
    using System;
    using System.ComponentModel;
    using System.Drawing;
    using System.Windows.Forms;
    using Telerik.Reporting;
    using Telerik.Reporting.Drawing;

   
 public partial class rptExample: Telerik.Reporting.Report
   
    {
        
        public rptExample()
        {
           
            InitializeComponent();

           
        }


    }
}

3. and i have telerik cross tab and sql datasource which shows data when i check in configure mode of sql datasource but during the running of actual project. I have build the solution which includes its dll in the bin folder of website , i cannot see any data can somebody help with this thanks