My Aiwa stereo (Model #CX-NAJ70) has (2) optional surround sound inputs, but I'm not getting any sound from the Klipsch 2-way speakers I've plugged into the back of the stereo (when I'm watching a Blu-ray movie on my LG LED TV (Model #49LB5500). I purchased a Digital-to-Analog converter box that is connected to a TOSlink output from the TV and connected by L/R RCA cables to the video-in on the back of the Aiwa unit, but las, no sound from the Surround speakers. Any ideas?Thanks ahead of time.