I've tried Windows Media Player and Nero and a few other programs to stream media to my DSM510 and the ONLY one that works wicked good is TwonkyMedia Server. It works GREAT with NO issues. Not sure why it's such a secret, but try it out......I actually love my DLINK now, before I found the Twonky software I hated this thing and was ready to smash it....with no help from any of the forums or the Dlink site. Good luck all