My brother has the same dock. He had the problem when he first got his HD, so he thought his dock was broken. Luckily, the dock was on clearance at Best Buy for $50, so my mom bought another one. Unfortunately, this one didnt work either, so my mom took it back. Unfortunately, it looks like none of the old Altec Lansing Zune docks are completely compatible with the new Zune HD. The other one (
http://www.blogcdn.com/chinese.engad...ec-lansing.jpg ) will play the Zune HD, but wont charge it or sync it, and the remote wont work.