It's what i said before, try to select the region of the DVD.
Like -
Norht America
Latin America
Asia
ect...
That's what I was thinking too.
Just get it changed at the shop, jolie.
Probably your player can't read it becouse of something on the DVD. Or something that's not on it. Not all DVD's in all countries are alike. It could have something to do with the protection on it.