Problem with geckoFX browser. (Code works fine with IE)

string shareno = (geckoWebBrowser1.Document.GetElementById("shareno" + i).InnerHtml).Trim().Substring(6).ToString();
              MessageBox.Show(train);
            //  train.Trim().ToString();
              if (trainno == train)
              {
                  for(J=0;J<=11;J++)
                  {
                  MessageBox.Show("goning to select the class with the help of j loop");
            Skybound.Gecko.GeckoElementCollection inputclick = geckoWebBrowser1.Document.GetElementsByTagName("input");
                  // GeckoInputElement inputclick = new GeckoInputElement(geckoWebBrowser1.Document.GetElementsByTagName("input")[0].DomObject);
                  foreach(Skybound.Gecko.GeckoElement go in inputclick)
                  {
                      //MessageBox.Show("now going to click class and i am in foreach");

                      //MessageBox.Show("PARENT ID" + go.Parent.GetAttribute('id'));
                      if (classs == "SL")
                      {
                          if (go.GetAttribute("type").Equals("radio") && go.GetAttribute("Name").Equals("classcode") && go.Parent.GetAttribute("id").Equals("sl" + i))
                          {
                             // MessageBox.Show("inside if");
                           go.SetAttribute("checked", "checked");
 

                              break;
                          }
 
                      }
                      else if (classs == "3A/C")
                      {
                          if (go.GetAttribute("type").Equals("radio") && go.GetAttribute("Name").Equals("classcode") && go.Parent.GetAttribute("id").Equals("a3" + i))
                          {
                             // MessageBox.Show("inside if");
                              go.SetAttribute("checked", "checked");
                              //  go.click();
                              //  go.Focus();

                              break;
                          }
 
                      }
                      else if (classs == "2A/C")
                      {
                          if (go.GetAttribute("type").Equals("radio") && go.GetAttribute("Name").Equals("classcode") && go.Parent.GetAttribute("id").Equals("a2" + i))
                          {
                             // MessageBox.Show("inside if");
                              go.SetAttribute("checked", "checked");
                              //  go.click();
                              //  go.Focus();

                              break;
                          }
 
                      }
                      else
                      {
                          MessageBox.Show("train not match with class");
                      }
 
                  }
 
                  break;
                  }
                  break;
              }
 
          }