diff --git a/src/main/java/cn/reddragon/eportal/Authenticator.java b/src/main/java/cn/reddragon/eportal/Authenticator.java
index a44a33c..5dad15a 100644
--- a/src/main/java/cn/reddragon/eportal/Authenticator.java
+++ b/src/main/java/cn/reddragon/eportal/Authenticator.java
@@ -10,7 +10,7 @@
 import java.io.IOException;
 import java.io.PrintWriter;
 import java.net.HttpURLConnection;
-import java.net.NoRouteToHostException;
+import java.net.SocketException;
 import java.net.SocketTimeoutException;
 import java.util.List;
 import java.util.Map;
@@ -117,23 +117,25 @@ public static void checkOnline() {
             error = false;
             if (connection.getResponseCode() != HttpURLConnection.HTTP_MOVED_TEMP) {
                 if (HelloApplication.controller != null) {
-                    Platform.runLater(() -> HelloApplication.controller.resultText.setText("Auth server error!"));
+                    Platform.runLater(() -> HelloApplication.controller.resultText.setText("Error: Auth server error!"));
                     error = true;
                 }
             }
         } catch (SocketTimeoutException e) {
+            System.err.println(e.getMessage());
             if (HelloApplication.controller != null) {
                 Platform.runLater(() -> {
-                    HelloApplication.controller.resultText.setText("Auth server connection timeout!");
+                    HelloApplication.controller.resultText.setText("Error: Auth server connection timeout!");
                     error = true;
                     //HelloApplication.controller.button.setDisable(true);
                 });
             }
             online = false;
-        } catch (NoRouteToHostException e) {
+        } catch (SocketException e) {
+            System.err.println(e.getMessage());
             if (HelloApplication.controller != null) {
                 Platform.runLater(() -> {
-                    HelloApplication.controller.resultText.setText("No Internet connection!");
+                    HelloApplication.controller.resultText.setText("Error: No Internet connection!");
                     error = true;
                     //HelloApplication.controller.button.setDisable(true);
                 });
diff --git a/src/main/java/cn/reddragon/eportal/HelloController.java b/src/main/java/cn/reddragon/eportal/HelloController.java
index b0d1eeb..01f0ae9 100644
--- a/src/main/java/cn/reddragon/eportal/HelloController.java
+++ b/src/main/java/cn/reddragon/eportal/HelloController.java
@@ -62,6 +62,7 @@ public void updateUI() {
             remainLabel.setText("Time remaining:");
         }
         statusLabel.setText(sb.toString());
+        button.setDisable(Authenticator.error);
     }
 
     @FXML