Cross DJ Le and headphones

Hello,
I have a SDJ100 a1, bought at Lidl.
I connected it to my laptop and it works.
My problem is that I also have a Creative SB1090 xfi usb sound board and want to create the folowing setup:
for preview and sync to hear trough my headphones
for play to use the creative board.
The fun part is that trough direct sound i can see the devices but when i want go to dual sterea, I only have output 1, no other posibility to use output 2 and setup to another soundcard.
Plese help me into figuring this out.
Regards,
George
I have a SDJ100 a1, bought at Lidl.
I connected it to my laptop and it works.
My problem is that I also have a Creative SB1090 xfi usb sound board and want to create the folowing setup:
for preview and sync to hear trough my headphones
for play to use the creative board.
The fun part is that trough direct sound i can see the devices but when i want go to dual sterea, I only have output 1, no other posibility to use output 2 and setup to another soundcard.
Plese help me into figuring this out.
Regards,
George