NEC ND2500A and divx problem!



hi, i have a ned nd2500a (firmware official 1.0) and i have a problem: i have burned so much dvd with divx files and now when i see the divx i take note that there is a problem of click (spirt, sprint, fit) in some divx when i see it
i don’t know what is, i always used good dvd (prodisc s03 e ritek g04) and i’ve burned fine with nero burning rom
anyone have this problem?
thank you to all and sorry for my english