Reply to Audacity recording issues with Aiso4all

Ok, So I'm trying to record a set I'm doing in Traktor with Audacity, but it won't record when I switch it to Stereo Mix recording. I'm using an HP ENVY 14 with an IDT soundcard which won't work with Traktor which is why I got aiso. When I don't have Traktor open, and play something from my computer with the IDT driver, it records in Audacity just fine. When I open/play something through Traktor (with the Aiso4all driver) though, it doesn't record anything.

Is there some way around this or some way to fix it?