My wav files play in iTunes. Maybe the file is broken. But if not, try selecting the file within iTunes and go up to Advanced on the menu bar and select Convert Selection to AAC. See if it plays as an AAC file (the new file will be added to your library. Set the main window to sort by date added, then after the conversion is done, scroll down some and then back up and the top of the list will refresh to show your newly converted file, now in AAC format. Try to play that and report back.