Ddj 1000srt not. Working properly

Hi, 

im having a issue with the ddj 1000srt, in deck 1 song loads good and plays, but in deck 2 the songs load but doesn’t play, the play button stays blinking, and the deck 4 works fine, right now thats how im playing with it, deck 1 and 4, but in the computer works perfect deck 2, if anybody has the same problem ?

Thanks