CDJ +CDPCX235+MDSPC2+MDMANAGER

Mi Installations is: multi cdplayer Sony (200 discs) + minidisc tape deck + CDJ + MDManager, all of them interconnected via S-link. I have one problem: sometimes my Md deck can't get track names, It gets confussed with times between Cd's (while they're changing) or even worst, the CD player doesn't play some tracks. To whom it may concern: what happens?, where is the problem?