I received the Yamaha YST-SW215 subwoofer for Christmas to add to my home theater system. I got the Monster Bass 300 subwoofer cable for it. I also got the Sony SLV-D350P DVD/VCR combo player. I got the combo player hooked up and it works great. My problem is I can't get the subwoofer to work. It will power on but no sound will run through it. I think I might have a setting wrong on my receiver since it's not recognizing it. I have tried to adjust the volume setting on the sub, all the other settings on it but it makes no difference. My receiver is a Pioneer VSX-D412. I have the subwoofer cable running from the left input on the back of the sub (as shown in the subwoofer manual) to the subwoofer preout on the back of the receiver (like what is shown in the receiver manual.) For the combo player I have a digital optical cable from the optical out on the player to the optical in on the receiver. Some of the settings I have set for the receiver are: 1. 4.1 ch (I don't have a center speaker; I have two front, two surround, and the subwoofer.) 2. Sound mode: Advanced 3. Input signal: Auto 4. Effect: Midnight 5. Speaker setting: FL-C*-SL, Subwoofer setting: PLS (says use this for extra bass, if I set this to ON, no difference.) 6. Optical digital input setting: DVD The receiver display shows: signal auto digital, adv surround, midnight and its set to DVD/LD. I have gone through the manuals about three times now with no success. I was really looking forward to having the subwoofer as an addition to my system but it's really frustrating that I can't get it to work. Any help would be greatly appreciated! Thanks.