copy block buster games

[toocko]

I recently purchased some new games from Block Buster that I haven't been able to copy. I have purchased games before from them and have backed those up with no prob. But I did notice that the games I recently purchased have like a stick on top of them. Look like a security sticker with two lines running thru it. It appears that all the games that have this I am unable to back up. Is this a coincidence? Tried backing up toy story 2, spiderman 2 with no success!!!!!!!! Anyone have ideas. I am using CD-R win and have backed up many other games.