I don't know why I can't play/view some mp3 files in the viewer preview window. I thought this is suppose to be a common feature. I've tried several different files and the screen gets activated but stays in a black screen. I have copied some mp3 to a flash card and they will play from there but the exact same files on my hard drive won't play. Many files in other location on my hard drive will play, but in other locations they will not. If I copy the file to a flash card it'll play, but if the same file is copied to another location on my hard drive it doesn't play. Do I need some special configuration or some extra file to install. Any help would be great.