I have completed the crystal dragon puzzle. After lifting the lever in room and doors open to Erathsemedor, as you come out of hallway far door is opened as you proceed it closes. I noticed a thuding sound as I came out of room so I tried to place something on top of it (a treasure chest) and go back to the door but it still closes. Does anybody have any ideas or have they managed to get into this room, it is to the left of the room with the Mavin Sword? Also the dragon is sitting on a treasure can't seam to get that I don't know if you are supposed to be able to get it.

You exit Dragon Spire from the room with the sword, via a cave as I recall. When you are in the
cave you can also go to the other side of the second door. Don't recall if the door opens then or
not, but you arn't missing anything.
Some people say they have killed the dragon (after getting the sword) to get mega experience. I
don't know if you can get any treasure from him then.