Hello guys,i have Philips MMS460 5.1 PC Speaker at my home.all the speakers are working properly but it is not working properly. All speakers suppose to work together but they are not working together. I have bought separate adapter for proper power supply.please suggest me something that should work. As its a 5.1 speaker so it was suppose to work together with sub-woofer. If somebody has knowledge than please let me know.