My hard drive crashed and I had a new one installed. However, now I am not getting any sound out of my speakers. When I bring up the volume control for windows XP, I get the message: "There are no active mixer devices available. To install mixer devices, go to Control Panel, click Printers and Other Hardware, and then click Add Hardware". I'm assuming something is disconnected inside and it is not a software problem. Any advice?? Thanks in advance.