just recently purchased ddjs1. During a gig this weekend i loaded a file from the right deck to the left deck. Itch froze and the music started cutting up and stalling and then came to a stop. It happen to me twice. saved myself by connectintg an ipod to aux. Also as i changed the effects from the contoller, it made the music stutter. i hae a macbook pro 13in 2.3 ghz icorei5 processor and 4 gb memory. Help please.