Reply to CDJ 1000 Mk2 via VCI 400 Soundcard

Hey everyone,
I recently got two CDJ1000 Mk2's and hooked them up to my c and d decks on my vestax vci 400 ege I got from DJTT a few months ago. Playback functionality with the time coded CDs worked but there were some issues with tempo and calibration failed. I noticed that traktor believes they are vinyl cause of this calibration image:
scope_05.jpg

and usually if you use the NI audio interface you can flip a switch to change from cdj to vinyl and vice versa, but on the vci400 there is no switch... Is there a way to use them or do I need to fork over some more money for a sound card?

Thanks,
Steve