Tool bar of User control it's button Disabled and lost focus when i click any where in the form

#region Add
        private void CanExecuteAdd(object sender, CanExecuteRoutedEventArgs e)
        {
            e.CanExecute = true;

            e.Handled = true;
        }

        private void AddExecuted(object sender, ExecutedRoutedEventArgs e)
        {
            this.ClearControls();
        }
        #endregion
        #region Close
        private void CanExecuteClose(object sender, CanExecuteRoutedEventArgs e)
        {
            e.CanExecute = true;
            e.Handled = true;
        }

        private void CloseExecuted(object sender, ExecutedRoutedEventArgs e)
        {
            try
            {
                if (this.IsChanged())
                {
                    string ST = "هل ترغب فى حفظ التعديلات  ؟";
                    MessageBoxResult R = MessageBox.Show(ST, "حفظ", MessageBoxButton.YesNo, MessageBoxImage.Question, MessageBoxResult.Yes);
                    if (R == MessageBoxResult.Yes)
                    {
                        this.Maintain_CloseForm_Med();
                    }
                    else
                    {
                        this.Close();
                    }
                }
                else
                {
                    this.Close();
                }
            }
            catch (Exception ex)
            {
                MessageBox.Show(ex.Message);
            }
        }
        #endregion

private void IntializeRoutedCommand()
        {
            //==========OpenRoutedCommand Of ToolBar================
            RoutedUICommand NewRoutedCommand = new RoutedUICommand();
            CommandBinding NewCommandBinding = new CommandBinding(NewRoutedCommand, AddExecuted, CanExecuteAdd);
            NewRoutedCommand.InputGestures.Add(new KeyGesture(Key.N, ModifierKeys.Control));
            this.CommandBindings.Add(NewCommandBinding);
            this.Btn_New.Command = NewRoutedCommand;
            //=======================================================
            RoutedUICommand ClearRoutedCommand = new RoutedUICommand();
            CommandBinding ClearCommandBinding = new CommandBinding(ClearRoutedCommand, ClearExecuted, CanExecuteAdd);
            ClearRoutedCommand.InputGestures.Add(new KeyGesture(Key.R, ModifierKeys.Control));
            this.CommandBindings.Add(ClearCommandBinding);
            this.Btn_Clear.Command = ClearRoutedCommand;
            //=======================================================}