Hello! I'm on my second set of the wireless subwoofer kits. The first one started popping and I noticed everytime there was a pop the blue light would go red. Nevertheless, I ordered a new set and the new ones don't work at all. I get blue lights on both units, but no sound. If I plug in the old ones I get sound, but still get the popping. I know I have them hooked up correctly, and according to the lights they are connected. Any tricks to this or did I just get a bum set? Unfortunatly, I can't return them because I waited too long to hook them up.