diff --git a/APKToolGUI/Forms/FormMain.cs b/APKToolGUI/Forms/FormMain.cs
index 5fee1f0..df85fab 100644
--- a/APKToolGUI/Forms/FormMain.cs
+++ b/APKToolGUI/Forms/FormMain.cs
@@ -1001,18 +1001,21 @@ await Task.Factory.StartNew(() =>
                                 }
 
                                 string device = selAdbDeviceLbl.Text;
-                                if (!String.IsNullOrEmpty(device) && Settings.Default.Sign_InstallApkAfterSign)
+                                if (Settings.Default.Sign_InstallApkAfterSign)
                                 {
-                                    ToStatus(Language.InstallingApk, Resources.waiting);
-                                    ToLog(ApktoolEventType.Infomation, "=====[ " + Language.InstallingApk + " ]=====");
+                                    if (!String.IsNullOrEmpty(device))
+                                    {
+                                        ToStatus(Language.InstallingApk, Resources.waiting);
+                                        ToLog(ApktoolEventType.Infomation, "=====[ " + Language.InstallingApk + " ]=====");
 
-                                    if (adb.Install(device, outputFile) == 0)
-                                        ToLog(ApktoolEventType.None, Language.InstallApkSuccessful);
+                                        if (adb.Install(device, outputFile) == 0)
+                                            ToLog(ApktoolEventType.None, Language.InstallApkSuccessful);
+                                        else
+                                            ToLog(ApktoolEventType.Error, Language.InstallApkFailed);
+                                    }
                                     else
-                                        ToLog(ApktoolEventType.Error, Language.InstallApkFailed); ;
+                                        ToLog(ApktoolEventType.Error, String.Format(Language.DeviceNotSelected, outputFile));
                                 }
-                                else
-                                    ToLog(ApktoolEventType.Error, String.Format(Language.DeviceNotSelected, outputFile));
                             }
                             else
                                 ToLog(ApktoolEventType.Error, Language.ErrorSigning);