fuze won't sinc new files

THE FILES ALL SEEM TO BE WMA FILES AND NONE SEEM TO BE LOCKED OR READ ONLY.

MORE INFO:

VERSION :V02.02.28A

Even though some music files show up on the WMP as on the card the Fuze shows no files.

Another question:

I have all my files also in itunes format. Is there a way to convert them to a wma format?