I have a chinese midterm speech tomorrow and my gf recorded my speech and some of the words that I have a hard time saying, in chinese. The files are a .wav and I added them to itunes and to my ipod, however, the ipod doesn't play them. It shows them in the library but it just skips to the next track (in the playlist) when I select them.

Do I need to change their file status or anything?

Thanks!