ddj sz only one channel when mapped to traktor?

Hi,

Hoping some one can help as I'm pretty new to all this stuff. I've current got a Pioneer ddj sz and up until today I've been using Serato as my digital software. I decided I wanted to try the Traktor software knowing the ddj sz was capable. I have updated the controller and Traktor to the latest software and download the latest mapping file from the pioneer site. I have installed all as pre guildlines/ instruction which seemed to go well until I tried using the track decks. The problem I have is there is only sound coming from one channel for both track decks? I have turntables contacted to the other two channels which are fine. I've opened settings in Traktor to check audio output etc but all seems fine. Any changes I do make have no effect at all.

What am I doing wrong guys ? I've spent the last 5 hours on it :(

Any help would be much appreciated