Hiya!
Sorry about that - can you try again, and see if it works now?
I tried to attack and change from the map you were on, and for me it works. From the server's point of view, your character didn't even move from the center of the map, so I wonder if it might have been a bad connection to the server?
(The server also logged that it didn't hear from your game client anymore, and timed out eventually, so that kind of seems to support my theory:)
21.Sep.2013 22:26:43 server warn 7063 Disconnecting player Wyvern(44): Ping timeout
