I'm trying to add some mp3s to my library, but haven't had any luck. I've never had this problem before, but for some reason, iTunes is not allowing me to add the files. I've tried multiple methods - drag and drop, add folder to library, and add file to library....no luck. I'm not getting any error messages either. In the same session I was able to add other files to my library. The files are not corrupt, and are definitely mp3s because I can play them in windows media player without a problem, and the file is recognized as an mp3 in windows vista. Edit: Also, they are not write protected or licensed. Any ideas?