The VideoLAN Forums

Downloaded program just like instructions said and nothing works. Insert DVD it just returns error "unable to open file"
Installed on Ubuntu 9.04 system all the Updates were downloaded, made sure I had libdvdcss, and none of my Media Players work yet. I know, maybe we can use Virtual Machine and use Windows Media Player, maybe THAT might work huh?

From the description, I infer it should work. In other words, we can't help you with such terse a problem description.

Satrt vlc from a console with vlc -vvv and provide the logs