I just added a few DVDs to my new collection but some of them I can´t acces to it. Not to edit, not to see. If I click on it, I open the previous DVD I was in. I can´t delete this DVDs. They are in the collection but they don't exist (Cast don´t appear on filmography for example). I can't understand. I will thank any help. (sorry for my poor English)

Quoting CubbyUps:

Quote:
...If not then I would suggest doing a database repair. That usually fixes most problems.

Try this. Had this probleme also once. After a database repair it was fixed.
(Extras -> Options -> Utilities -> Database repair)