I've used the HD-A2 with the 990 without problems, so I don't know that it's as simple as a problem with HDCP compliance between the two. It is possible that there's an HDCP problem between the HD-A2 and your display, which could be tested by connecting the player directly to the display. HDCP handshake woes can be hard to trouble-shoot, though. I had a lot of trouble with my HD-A2 using a MonoPrice switch between it and the 990 - it would only work if I turned the A2 on after getting everything else set up right, and if I changed inputs at any time I had to shut down the player and start over.