crystal report error

using System;
using System.Collections.Generic;
using System.Linq;
using System.Web;
using System.Web.UI;
using System.Web.UI.WebControls;
using System.Data;
using System.Data.SqlClient;
using CrystalDecisions.CrystalReports.Engine;
using CrystalDecisions.Shared;
using System.Configuration;

public partial class _Default : System.Web.UI.Page
{
    protected void Page_Load(object sender, EventArgs e)
    {
        ReportDocument rd = new ReportDocument();
        DataSet1 ds1 = new DataSet1();
        DataTable dt = new DataTable();
        dt.TableName = "Crystal Repoart";
        dt = getallordeer();
        ds1.Tables[0].Merge(dt);
        rd.Load("C:\\Documents and Settings\\sakshi.k\\My Documents\\Visual Studio 2010\\WebSites\\WebSite2\\CrystalReport.rpt");
        rd.SetDataSource(ds1);
        CrystalReportViewer1.ReportSource = rd;

    }
    public DataTable getallordeer()
    {
        SqlConnection conn = new SqlConnection(System.Configuration.ConfigurationManager.ConnectionStrings["learnConnectionString"].ConnectionString);
        SqlCommand cmd = new SqlCommand();
        DataSet ds = null;
        SqlDataAdapter Sda;
        try
        {
            conn.Open();
            cmd.CommandText = "select customer_name,order_id,product_name,product_qty from customer1";
            cmd.CommandType = CommandType.Text;
            cmd.Connection = conn;
            ds = new DataSet();
            Sda = new SqlDataAdapter(cmd);
            Sda.Fill(ds);
        }
        catch (Exception ex)
        {
            throw new Exception(ex.Message);
        }
        finally
        {
            cmd.Dispose();
            conn.Close();
        }
        return ds.Tables[0];
    }
}