PLEASE HELP why dose it say i can't sync the rented movie from itunes onto my ipod?

[HihelloHellohi]

ok so i rented the movie eclipse from itunes and it took about a few hours to come onto my library and i went to sync it on my ipod and it says the teilight saga can not be synced to this ipod because it can not be played and i really want it on my ipod but i don't know what to do please help!!!