Reply to Noisy sound NI Audio 2 DJ

Hey guys

Today recieved my brand new Audio 2 DJ sound card. When i connect it to my macbook the sound it gives is very noisy (through the noise you can hear the song a little bit in the back ground) I did everyting the instruction manual described... I connected the soundcard to a adapter powerd usb-hub.
I got the same noisy sound trough my speakers as my headphone (chanels a and b). The sound also stays the same when i listen to Itunes, so i dont believe it has anything to do with Traktor...

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