more info Can't you open your drive at all? Any weird sounds, lights? Try opening with cmd. (start>run>cmd , type E:\, or whatever letter it has on yours) Do U get any error messages? Can U see anything related in Event viewer to it? (control panel>comp. management)
To add question to me's useful list:
Did the laptop every play them?
Do you mean that it can't read them at all, or just can't play certain content, like movies?
Does it have a DVD player?
Check your cd/dvd connection, If connection is ok then it could be damaged.