DJM 900 Nexus Not able to assign to volume fader in Video Mode

Hello Guys,

DJM 900 Nexus, when in Video mode, the volume fader is not working in video mode.

I want the video the fade in fade out on the volume fader, but then connected DJM 900 Nexus in External Mode, all the functionalities are disabled, and we cannot do Video DJ on DJM 900 Nexus.

Please help.

Thank you.