Toshiba SD-2700 DVD Player "ratatouille" Questions

...to play on the above referenced machine. Was careful not to buy an HD or blue ray DVD. Also bought Ratatouille and have no trouble playing it. This is the third copy of the DVD I have bought

...newer than the Sony ArcOS protection (or whatever it is called). I have the same problem with Ratatouille. I just purchased it, and neither of my players will play it. Its the dual layer of the ...