Ipod problem, video won't go on.?

[DaffA]

I just bought three TV Show episodes on ITunes and I am trying to put them on my 6th generation 80 GB iPod, but when I try to put them on, a box comes up and says, "[episode] was not copied to the ipod [my ipod] because it cannot be played on this ipod." I don't understand, I've already put movies and TV shows on my ipod without a problem, and I have 40 GB of space left. Can somebody help me?

[Ashley]

http://discussions.apple.com/thread.jspa?messageID=5627137

http://macosx.com/forums/mac-os-x-system-mac-software/293941-cannot-add-video-ipod.html