I have a numark idj2,

Question

i have a numark idj2, i can get music media off itunes the media records to my itunes libriary and ipods but will not go into the numark idj2, some of the media appears on the numark libriary but when you go to play it never gets off pause and if you keep pursueing the song the machine goes into error and shuts off, yet the tune plays off itunes and off ipod.