[LAU] My Tascam US-122

I got m Tascam US-122 it works fine, the mixers for it dont work in Qamix and gnomealsamixer, when I choose the usx2y soundcard the mixers are blank, nothing there. IS that suppost to happen? ANyways, I am getting noise from my KRK Rokit powered 5 speakers, headphones in the tascam gives me no noise, then I plug from the headphones output of the tascam to the speakers and I get noise! So I think it might have something to do with the speakers? The noise starts when I plug the USB for the tascam in, even when its not plugged in and just touches the metal it makes the noise. When I unplug my AC for my laptop, the noise stops... WHen add brightness to my laptop screen I get less noise... Does anyone have any solutions, more troubleshooting tips? Thanks.