Hi,
No offence, but I don't think hijacking another persons thread will get your problem sorted any quicker, rather create a seperate thread with your own question or query, as this will aid us in helping the creator of this thread as well as your problem instead of diverting our attention to you and losing focus on the original thread.
However since we on the topic, please ensure that all your volume controls are set to full volume, also please test an audio cd or mp3 on your respective media software (iTunes, WMP etc) and let us know if the program reports any error.
Regards
Phoenix®