iTunes or Winamp won't play through my DDJ-SX2

Hi, I recently bought the DDJ-SX2, before on my Mixtrack Pro 2 I used to be able to play sound from soundcloud/iTunes/Winamp through my Mixtrack out through my speakers, but now for some reason now when I try;

iTunes it goes to play the song but nothing happens,

Winamp I get: Error creating DirectSound buffer code 88780064

Soundcloud: Won't load

For some reason though Windows Media Player has no problem playing songs...

I know its nothing massive but it the only way I get to use my speakers with my computer.

If someone could help I'd be grateful.

Thanks