It sounds simple (and I'm sure it is to you guys) but I just can't get any sound from my speakers when I hook them up. I am connecting them as explained in the manual. It's just the plain old analog audio cables (or whatever you call those yellow, red and white cables). Am I missing something? The menu on the TV doesn't seem to give me any options as regards the sound. I have a Sharp 28" widescreen and a Marantz SR4400 receiver. I would really appreciate your help on this.