Record mix with DJM-900NXS2 by Audacity not working

As I know that Pioneer has released the 64 bit version of DJM 900NXS2's driver (Window 10). I plugged the cable into my laptop and the mixer, and set the last option in the driver is REC OUT (It's automatically set). I also chose the Line in is DJM 900NXS2 in Audacity but when I pressed play button, there wasn't any waveform in Audacity. I wanna know if I had something wrong with the setting ?. My setting in Audacity is 96kHz Sample Rate and 32 bit float Sample Format. Please help me. Thanks!