ddj sr left deck looses mapping after 2 hours of play time‏

Hello,

I have purchased ddj sr about 2 months now and I dont have issues until last thursday that after 2 hours of playing the left deck did some crazy things. Like when I pressed cue at the left deck the right deck song started to play from the start again, when i pressed hot cue button all the buttons from left or right deck flashing and changed to slicer mode both decks, when i pressed the tempo key button both decks started to loop the songs. I also noticed that in the left deck the lights of effects at the upper part were lightly light to the beat and the sampler light was changing colour to purple not blue...

I tried to switch off and on and nothing happened, I also tried to restart serato dj and my macbook but no luck, I was using firmware 1.07 from the day I purchased it and tried to reinstall it but the same... I tried to go to 1.6.2 version but nothing changed.

for 2 hours plays ok but as I said before the lights of effects and slicer are behaving strange even if it plays good and only the left deck.

I have a macbook pro core 2 duo 2.8 mhz, 4 ram, 256 ssd, 500 gb hard disk inside at cd rom position for music.

serato dj 1.6.3

pioneer dj ssr firmware 1.07

As i said 2 months i play every night perfect until thursday.

please help I dj every night