Reply to Running TSP2 with scratch control AND midi controller

Hi guys,
I am running traktor scratch pro 2 using 2 cdjs and NI's maschine.
I have done my own midi mapping and it works great. One problem
I am having is i can NOT run both at the same time. I hook up everything,
but traktor won't play the cdjs. if i check the settings, i clearly see that
when i press play and stop on the cdj, the software can see that its getting signal, but it just doesnt do anything on the software.....any help?

thanks!