I have a new Emprex 3.3gb mp3 player with a fully charged battery. My computer is running Windows XP home edition. I plugged the cable into the usb port and successfully transferred the content of one of my CDs. However, subsequent attempts have resulted in a 'usb device not recognised, one of the usb devices connected has malfunctioned and windows doesn't recognize it'. I don't understand why it worked the first time only. I have tried different ports, and other devices work with no problem. Can anyone please help? Thanks.