diff --git a/src/App.js b/src/App.js
index adbbda057993561536f8c94d05f23f341c92370f..3c967458fc2572ce34c5f6a222694a458eccd035 100644
--- a/src/App.js
+++ b/src/App.js
@@ -259,12 +259,12 @@ class App extends Component {
                             requestDuration:100,
                             duration:10,
                         },()=>{
-                            if(startBlock !=0 ){ 
+                            if(endBlock !=0 ){ 
                                 that.setState({
                                      endblockOld:endBlock,
                                      endCount:0,
                                  })
-                             } else if(startBlock == 0 || startBlock == "" || startBlock == undefined){ 
+                             } else if(endBlock == 0 || endBlock == "" || endBlock == undefined){ 
                                  that.setState({
                                      endBlock:that.state.endblockOld,
                                      endCount:that.state.endCount+1,