Tried hooking up my Pioneer PDP-5080HD/PDP-4280HD plasma display to my brand new 15" MBP. All I could get to show up was the pic of the Galaxy that Lion has. No Doc or anything else. I bought an HDMI to Display Port (Thunderbolt Port) adapter (Rocket Fish) from Best Buy for $25. Any ideas why it isn't working? Should I get an adapther from Apple?