Reply to getting rid of the humm/buzzing

not sure if this is the right place for this topic, so mods please move if this is inappropriate.

i'm getting this humm/buzzing sound when i hit the record button on the audacity program. you can totaly hear through out the entire mix when the sounds are at a minimum. i have ran the noise removal effect on different parameters, and all that is doing is distorting the tunes really bad. right now i'm using a vcm100, akai mpd24, with a inspron quad core. how can get a proper recording?

http://soundcloud.com/o_o-djendone-o-o/winter-mix-live-09-by-dj-endone