I have 2 sound cards but can not seperate for cue monitoring

really simple, i have 2 sound cards and i can not seperate the audio. i have seen several forum posts with no real answers, i have been messing with this for 3 hours, and with virtual DJ it took 30 seconds to setup, i am beggining to think that this software is inferior... please help
i have a sound card for my output audio that go to my speakers that the potential "crowd" would be listening to.
and
i have another sound card that my headphones are plugged in for cue monitoring so i can match and mix
i do not have this problem with virtual DJ, just the fact the discover does not properly map with vdj.
so does the mixvibes Cross software support 2 sound cards, so that i can assign one for audio output and one for headphone cue monitoring?
p.s.the type of hardware (soundcards) should not be dependant in order to accomplish what i am trying to accomplish considering no other DJ software has this problem.
i have a sound card for my output audio that go to my speakers that the potential "crowd" would be listening to.
and
i have another sound card that my headphones are plugged in for cue monitoring so i can match and mix
i do not have this problem with virtual DJ, just the fact the discover does not properly map with vdj.
so does the mixvibes Cross software support 2 sound cards, so that i can assign one for audio output and one for headphone cue monitoring?
p.s.the type of hardware (soundcards) should not be dependant in order to accomplish what i am trying to accomplish considering no other DJ software has this problem.