I switched the cables and it works .....so it is not the speaker. It must be the output jack or the setup in windows or the "soundmax" config with the onboard sound. There are 3 jacks for speakers: 1 for front, 1 for rear, and 1 for center/sub. I unplugged and plugged back in. Sound settings in control panel is set to 5.1 surround.
I just dont know. I dont want to buy a separate sound card if I dont have to.