Не работает нажатие на InlineKeyboardButton

Работа с Telegram.Bot Описываю бота

BOT = new Telegram.Bot.TelegramBotClient("<TOKEN>");
BOT.OnMessage += BotOnMessageReceived;
BOT.OnCallbackQuery += BotOnCallbackQueryReceived;
private async void BotOnMessageReceived(object sender, MessageEventArgs messageEventArgs)
{ 
Telegram.Bot.Types.Message msg = messageEventArgs.Message;
ChatID = msg.Chat.Id;
if (msg != "kb") return;
var inlineKeyboard = new InlineKeyboardMarkup(new[]
                {
                    new[]{ InlineKeyboardButton.WithCallbackData("West") },
                    new[]{ InlineKeyboardButton.WithCallbackData("Centre") },
                    new[]{ InlineKeyboardButton.WithCallbackData("East") }
                 });
await BOT.SendTextMessageAsync(ChatID, "contacts",
                    replyMarkup: inlineKeyboard);
}

Почему после нажатие на кнопки не срабатывает обработчик BotOnCallbackQueryReceived ?

private async void BotOnCallbackQueryReceived(object sender, Telegram.Bot.Args.CallbackQueryEventArgs e)
        {
            string buttonText = e.CallbackQuery.Data;
            await BOT.AnswerCallbackQueryAsync(e.CallbackQuery.Id, @"{buttonText}");
}