[MEncoder-users] Problem with DVD created by manDVD

Hi,
I created 2 videos by manDVD in Debian: one this week, second a year ago
- it was on different PCs, different version of Debian.
But both videos I cannot play by mplayer (Same problem has VLC on Linux
and Windows. VLC recognizes DVD as audio CD and try play track.)
They work on DVD player.
PowerDVD on Windows can play these DVD too.
Does anybody know why?
Jirka (GeBu)