Neenoid

Hi there! I've recently started using ExpressScribe to transcribe audio from .mp3 files. Unfortunately, when I load a folder, only a few of the .mp3 files work correctly. I've attempted to convert them to other file types with no success. Any suggestions? A note: The non-functioning .mp3s WILL load in both VLC and QuickTime Player, but they will not load in iTunes. Thanks, Stephen