Arduino Uno, TTS256, VoiceBox Shield

hello,

I just want to know the correctness of the tutorial, like most fo people, I assembled everything but the device only say ‘ready’. I’m using the Arduino Software, and whatever I entered on the serial monitor, the device doesn’t speak, but an orange led will be lighted once I pressed enter. Anyone can help or give some advices to me? I’m really new for this. Many thanks.