My sister is having a major difficulty with file compression on any mp3 player using media player 10. She wants to compress an 8MB (approx) file, but when she does the media player will copy about 100-150KB and that's all. The song does not play. She tried her PC (media player 7 windows me), my PC and her laptop (both media player 10 and XP). We have an older computer with media player 9, but it is slow. She says thanks to whoever can help.