Reply to Running Traktor with an external soundcard

Hi,
I have traktor installed on my macbook and I am trying to run it with an external soundcard. The soundcard is built into my rmp 3 players which are getting recognised and I am getting sound through traktor. However, the sound is playing through my macbook not my speakers.

I went into audio midi setup and its not recognising my rmp 3's, can anyone help? Have i missed something?

Regards,
Brendan