Creative Zen 4GB MP3, Video Player, FM Radio, SD Card Slot and Voice Recorder - BLACK]] I listen to audio books on my MP3 which I copy from MP3 CD's. After listening I delete the book. I do this either straight from the player or attaching the player to my pc by way of the USB cable. Up until now this has always worked but for some reason one particular title will not delete. Does anyone have any ideas please as this is using much needed space? Thanks. Marilyn.