Reply to Connecting numark ndx400 cdjs an M101 mixer a digiflex usb soundcard and vdjpro.

I'm literally just starting out and this is my 1st setup. I wanted to control mp3's from vdjpro with my cdjs and mixer.
I bought the external soundcard and a few 3.5mm to rca cables to hook everything up, however vdj is saying there isn't enough channels on the soundcard which isn't right as it has 6.
Any help would be much appreciated.