DVR-LX60 problem with reading dvd

iam not very good at english but i’ll try to explane my problem…

i bought couple days ago a ne DVR-LX60 HDD recorder, i tried to play original dvds and it works perfect but i cannot play movie backups or any burnt video on dvd ? on same kind of dvd at the same speed i burned video and on the other one pictures …
one with pictures going perfectly but the other one it says “no title” like theres nothing on it
is there any restrictions at burning speed or dvd+r and dvd-r ?

http://www.pioneer.eu/eur/products/45/133/501/DVR-LX60/index.html

problem solved