I've been using the Numark NS6 for a while now, i'm having audio problems with the 1st upfader so i decided to switch to the 3rd and 4th whenever i DJ, but unfortunately the 1st and 2nd upfader controls the ME upfader, anyway on how i can make the Virtual ME upfader and Video, work/show for the 3rd and 4th upfader on the NS6?