I have the latest version of Itunes and running Windows 7 with an older generation of ATV. I am using an external 2TB storage device. Have aprox 800 converted movies and 150 converted TV programs. Everything was working as it should before Xmas. Disconnected the Hd and took it with me on holidays. Returned; reconnected the Hd and I keep getting the message from my ATV that it can not recognize the file format. In Itunes; when I try to watch a movie; I get the message that Itunes can not locate the said file. Anybody know what gives here?