Hi. I can't get the audio to work on a couple of books. The first is called : Les Trente-Neuf Marches (John Buchan) and it is marked as having an audio of 36:33 and it has the little headphones icon next to it so it does seem to have audio, however when I click on play nothing happens. I have noticed this problem with another book also called Détours by René Crevel. I'm keen to start these books so I am hoping there will be a solution. Thanks in advance.