Help

Hey Guys . I need help ! I'm new . 

I got the DDJ RB . But there isn't any sound from rekordbox soft when i'm playing music with DDJ-RB . But still have sound from youtube , itunes when i'm turning up the music..... . I plugged RCA (speakers) into DDJ-RB but the speaker not plugged into laptop. This is SPEAKER - AUDIO

And this is DDJ-RB ASIO Audio:

What should i do and what should i choose 

PLS HELP . SORRY FOR MY BAD ENGLISH