jıt hata ayıklama sorunu

DataSet myDoviz = new DataSet(); 
              myDoviz.ReadXml( 
                  "http://realtime.paragaranti.com/asp/xml/icpiyasa.asp"); 
              dataGridView2.DataSource = myDoviz.Tables[0];  
             
                  //Kur Yenileme Sayacı 
                  Timer tmr = new Timer(); 
                  tmr.Interval = 10000; 
                  tmr.Start(); 
                  tmr.Tick += new EventHandler(Form1_Load); 
                  // 
                  lblDolar.Text = myDoviz.Tables[0].Rows[1][2].ToString(); 
                  lblEuro.Text = myDoviz.Tables[0].Rows[2][2].ToString(); 
                  lblBilesik.Text = myDoviz.Tables[0].Rows[6][2].ToString(); 
                  lblImkb.Text = myDoviz.Tables[0].Rows[0][2].ToString(); 
                  lblTarih.Text = myDoviz.Tables[0].Rows[1][5].ToString(); 
              
                                                 
       }