problem with crystal reports and web.config

hi all,

I have created one crystal report in Crystal Report XI using stored procedure

My stored procedure has four parameters:
1.@intFilterType
2.@strIDs
3.@dtfromDate
4.@dtToDate

from .aspx page I pass the value to these parameters. I want to use the same web.config connectionstring for my crystal report too. I don't want crystal reports to logon when reports run.
So, please help me.

Report.aspx page is given below.

protected void Page_Load(object sender, EventArgs e)
{
  TextBox1.Text = Session["Selected"].ToString();
  TextBox2.Text = Session["ReportBy"].ToString();
  TextBox3.Text = Session["FromDate"].ToString();
  TextBox4.Text = Session["ToDate"].ToString();
  CrystalReportSource1.Report.FileName = Server.MapPath("Reports/RptExpiryListByitem.rpt");
  ParameterDiscreteValue objDiscreteValue;
  ParameterField objParameterField;
  objDiscreteValue = new ParameterDiscreteValue();
  objParameterField = new ParameterField();
  objDiscreteValue.Value =TextBox1.Text;
  objParameterField = CrystalReportViewer1.ParameterFieldInfo["@strIDs"];
  objParameterField.CurrentValues.Add(objDiscreteValue);
  CrystalReportViewer1.ParameterFieldInfo.Add(objParameterField);
  objDiscreteValue.Value = TextBox2.Text;
  objParameterField = CrystalReportViewer1.ParameterFieldInfo["@intFilterType"];
  objParameterField.CurrentValues.Add(objDiscreteValue);
  CrystalReportViewer1.ParameterFieldInfo.Add(objParameterField);
  objDiscreteValue.Value = TextBox3.Text;
  objParameterField = CrystalReportViewer1.ParameterFieldInfo["@dtFromDate"];
  objParameterField.CurrentValues.Add(objDiscreteValue);
  CrystalReportViewer1.ParameterFieldInfo.Add(objParameterField);
  objDiscreteValue.Value = TextBox4.Text;
  objParameterField = CrystalReportViewer1.ParameterFieldInfo["@dtToDate"];
  objParameterField.CurrentValues.Add(objDiscreteValue);
  CrystalReportViewer1.ParameterFieldInfo.Add(objParameterField);
  CrystalReportViewer1.ReportSourceID = "CrystalReportSource1";
}