Okay, after months I finally sorted out my sound to work. Question is, what can I do to make my volume switch on my speaker work? I'm getting sound from my speakers, and can adjust the sound on whichever player I use, but can't turn the sound up or down on the speaker itself. I'm thinking that it's something rather simple, but not sure what to do. I have Harmon Kardon JBL Invader 5.1 speakers.