Reply to Numark DJ io in Traktor = tracks play slow + crackling sounds

Hi,

I am using a Numark DJ IO souncard with Traktor Pro on a Windows 7 netbook 32 bit OS system. When I plug in my soundcard the tracks in Traktor play very slow, and I only hear very loud ticks. I have tried every latency setting, and have also tried turning off wireless connection & bluetooth, but doesnt help! Hope somebody can help me out.