DDJ-WEGO - Laptop Spekers

Hello everybody...

Why can't I play through my computer speakers? As soon as I change the settings and hit apply, it just reverts back to the AISO soundcard and plays through my headphones.

and plz DONT give me the link: http://www.youtube.com/watch?v=WYEJ2BjzXoc cuz i try this one.

thx all!