Crystalreport Viewer Raporu görüntületmiyor

 
          protected void Page_Load(object sender, EventArgs e) 
          { 
              try 
              { 
                  string ID = Session["ID"].ToString(); 
                  ReportDocument rptDocument = new ReportDocument(); 
   
                  if (!IsPostBack) 
                  { 
                      DataSet ds = new DataSet(); 
                      kural.VeriGetir(ds, ID ); 
   
                      rptDocument.Load(Server.MapPath("~/Raporlar/RP_BirSonrakiBakimlar.rpt")); 
                      rptDocument.SetDataSource(ds); 
                      CrystalReportViewer1.ReportSource = rptDocument; 
                     // CrystalReportViewer1.DataBind(); 
   
                  } 
              } 
              catch (Exception ex) 
              { 
                  throw ex; 
              } 
   
          }