so you HAVE tried to plug them into a normal cd player/radio? and did they work when you plugged them in to the cdplayer/radio (to the head phone jack) and you say 'when they got power' so i'm assuming they don't have an additional power-plug... does the green light come on when you plug it into the computer

also stupid question but go to control panel> sound and audio devices> first tab there, click advanced, there should be 5-6 diffrent little 'levers' are all of those all the way up? if not, try again and tell me how it works