I have had trouble consistently getting my protected music downloads (Napster & Wal-Mart protected by Microsoft DRM) to play consistently. Some times a song will play, but if i ask to play it again, it will tell me that I do not have permission. Othr times I cannot get any of protected content to play. I am using Windows Media Player 11 as the server and when I boot up the DSM-520, it tells me that it has successfully logged in to the server and that I can now play protected content.
Any ideas?