Drivers, FAQ's, instructions are all posted on the BA website. Please read and follow instructions.
You will note that it states most common problems are caused by lack of a proper working sound device, eg: sound card or integrated motherboard sound chipset. Since you failed to provide any information about whether your sound device is working, all I can suggest is to read and follow BA instructions.
http://www.bostonacoustics.com/tec_multimedia_faq.aspx