diff --git a/webapp/controller/KefuController.class.php b/webapp/controller/KefuController.class.php
index 427b33c..436f51d 100644
--- a/webapp/controller/KefuController.class.php
+++ b/webapp/controller/KefuController.class.php
@@ -181,6 +181,10 @@ class KefuController {
             ));
             $this->sendOneDBInfo($conn, $media_conf);
         }
+        echo json_encode(array(
+            'errcode' => 0,
+            'errmsg' => '',
+        ));
     }
 
     private function checkSignature()
@@ -248,9 +252,9 @@ class KefuController {
                                            "miniprogrampage" => $game_conf
                                        ));
 
-                    if ($row['idx'] > $last_idx) {
-                        $last_idx = $row['idx'];
-                    }
+                }
+                if ($row['idx'] > $last_idx) {
+                    $last_idx = $row['idx'];
                 }
             }
         }