dirty noise using djcontroller instinct

hi all!!

i am having some troubles with my instinct controller while playing or mixing tracks. speakers are connected with the controller via aux. and my headphones are connected to the controller as well, i use traktor pro scractch 2 mapped through the hercules official file. when i play some track both through speakers and/or headphones the music sounds with some dirty / interferences sound.

some spanish users have experienced the same problem: http://www.herculesdjmixroom.com/en-gb/forum/es-primeros-pasos-en-djing-por-ordenador/012501/

would really appreciate some help!

The following documents will propably help:

Thanks! As soon as I try the instructions I will let u know!