Using the Beta version of Windows Media Player 11 to transfer media files to Philips digital audio players may result in abnormal behavior of your PC , Digital Audio Player or Windows Media Player. Philips will soon be releasing Firmware upgrades for certain models to ensure proper working with Windows Media Player 11. Meanwhile, please continue using Windows Media Player 10 or the Software that your product came with , for transferring media files to your Philips digital audio player.