DDJ 1000 - Deck 2 stops mid playing !!!!HELP!!!!!!!!!

I just got myself a DDJ 1000 and my Deck 2 Stops playing in the middle of the Song.The deck keeps being responsive between Controller and Rekordbox but CUE and PLAY button wont react on Controller.

i have to turn off the unit and when i then press play it starts playing where it left off.

Sometimes i am able to skip the track, but then that track starts immediately,sometimes just the Rekordbox waveform plays but the track doesnt show sound and when i press CUE sounds comes but PLAY button is still non functional.

All this happens mostly while i am pressing pads or loop button or whatever button. it happened to a variety of actions. once getting out of the loop button another time pressing HOT CUE A button. 

I updated Firmware, updated Driver, re- installed Rekordbox 6 and i can't figure this out. It only happens to DECK 2.

PIONEER >>>>>>>>

PLEASE HELP