Record using Traktor Pro 2 and Pioneer setup, without using Audio 6

Hello one and all. I have a Traktor Pro and Pioneer setup (DJM 2000 and 2 CDJ 2000nxs decks). I recently discovered digital cables setup for my Pioneer (OMG much clearer sound LOL). I removed my standard RCA jacks and went optical. at first I thought I could not connect to Traktor without my audio 6 controller, until someone told me that you can use your mixer to connect. I plugged in from my mixer to my laptop, and Traktor can see my DJM 2000. The problem is I am trying to record to Traktor and it does not pick that up. I know there are a couple of tweaks that need to happen, but I don't know how to do that. Any help would be greatly appreciated