XML File to Crystal Report

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ASP.NET

//Button click to show report
System.Web.HttpContext.Current.Session["ReportName"] = "YearlyLeaveStatusReport.rpt";
string CID = ddlCompany.SelectedValue;
string DID = ddlDepartment.SelectedValue;
int year = Convert.ToInt32(txtYear.Text);
LeaveRepository leaveRepository = new LeaveRepository();
DataSet ds = new DataSet();
ds = leaveRepository.EmployeeYearlyLeaveStatusReport(CID, DID, year);
ds.WriteXml("D:/YearlyLeaveStatus.xml");
System.Web.HttpContext.Current.Session["rptSource"] = ds;
ClientScriptManager cScript = Page.ClientScript;
Type cType = this.GetType();
string script = @"<script language=javascript>window.open('frmReportViewer.aspx')</script>";
if (!cScript.IsClientScriptBlockRegistered(cType, "ViewReport"))
cScript.RegisterClientScriptBlock(cType, "ViewReport", script);


and Report viewer

bool isValid = true;

                string strReportName =  System.Web.HttpContext.Current.Session["ReportName"].ToString();    // Setting ReportName
                var rptSource =  System.Web.HttpContext.Current.Session["rptSource"];

                if (string.IsNullOrEmpty(strReportName))
                {
                    isValid = false;
                }

                if (isValid)
                {
                    ReportDocument rd = new ReportDocument();
                    string strRptPath = System.Web.HttpContext.Current.Server.MapPath("~/") + "HR/Attendance/Reports/Attendance\\" + strReportName;
                    rd.Load(strRptPath);
                    if (rptSource != null && rptSource.GetType().ToString() != "System.String")
                        rd.SetDataSource(rptSource);
                   rd.ExportToHttpResponse(ExportFormatType.PortableDocFormat, System.Web.HttpContext.Current.Response, false, "crReport");

                    // Clear all sessions value
                    Session["ReportName"] = null;
                    Session["rptSource"] = null;
                }
                else
                {
                    lblMessage.Text = "<H2>Nothing Found; No Report name found</H2>";
                }
            }
            catch (Exception ex)
            {
               lblMessage.Text = ex.ToString();
            }

An exeption catch The report has no table.pls tell me how to xml file data show on crystal report.