problem in printing of cryatal report in IE8

 using System.Web;
using System.Web.UI;
using System.Web.UI.WebControls;
using CrystalDecisions.CrystalReports.Engine;
using CrystalDecisions.Shared;
using System.Data;
using XP.Tools;

public partial class Report1 : System.Web.UI.Page
{
    #region "Declaration Report Document and DataSet"
    ReportDocument crpt = new ReportDocument();
    string rptLoc = String.Empty;
    // Assumed Dataset1 has already created in App_Code with its fields
    DataSet1 ds = new DataSet1();
    #endregion

    #region "Methods for Adding a parameters"
    private void AddParameter(ReportDocument reportDocument, string value, string parameterName)
    {
        ParameterFieldDefinitions prmDef = reportDocument.DataDefinition.ParameterFields;
        ParameterValues prmVal = new ParameterValues();
        ParameterDiscreteValue prmDiscreteVal = new ParameterDiscreteValue();
        prmDiscreteVal.Value = value;
        prmVal.Add(prmDiscreteVal);
        ParameterFieldDefinition prmFD = prmDef[parameterName];
        try
        {
            prmFD.ApplyCurrentValues(prmVal);
            prmFD.ApplyDefaultValues(prmVal);
        }
        catch (Exception)
        {
            Response.Redirect("~\\Login.aspx");
        }
    }
    #endregion

    protected void Page_Load(object sender, EventArgs e)
    {
        CrystalReportViewer1.ReportSourceID = "CrystalReportSource1";
        CrystalReportSource1.Report.FileName = Server.MapPath("") + "\\CReport\\ClaimStatementIP.rpt";
        rptLoc = CrystalReportSource1.Report.FileName;
        crpt.Load(rptLoc);
        crpt.SetDataSource(ds);
        AddParameter(crpt, "Client Card Number", "CardNumber");
        AddParameter(crpt, "Client Policy Number", "PolicyOwner");
        DataTable dt = new DataTable();
        dt = GetBenefits();  // Get Benefits from database table 
        ds.dtCPT.Clear();
        if (dt.Rows.Count > 0)
        {
            for (int i = 0; i < dt.Rows.Count; i++)
            {
                DataRow row;
                row = ds.dtCPT.NewRow();
                row["Description"] = dt.Rows[i]["Description"];
                row["ActualCharges"] = dt.Rows[i]["ActualCharges"];
                ds.dtCPT.Rows.Add(row);  // the name of table in DataSet1 is 'dtCPT'
            }
            CrystalReportViewer1.ReportSource = crpt;
        }

    }

    private DataTable GetBenefits()
    {
        DataTable dt = new DataTable();
        // Some code to retieve records here from database
        // ....
        return dt;
    }
}