Reply to Serato Itch used with a Numark NS7 - Headphones do not work?????

We have a NS7 and since we have had it the headphone function has not worked. The distributor of the NS7informed me that it was a software problem with Itch and we should wait for the updates, download the latest and all will be sorted. I did this & downloaded the latest version of Itch but then the NS7 does not work with this version of Itch at all. I need someones help & give me direction of where and what to do to fix this.