I have a small collection of dvds, 5, and only 1 will play. All the codecs are installed but it's a no go on 4 of them. Help? I have to correct something, I have libdvdcss installed, I think that's the name. And that is what I meant by the codecs. I don't know if there are some new codecs needed for new dvds or what the deal is, perhaps it's my external dvd drive?