You must change your usernameEdit
Hi, per our username policy, you cannot have a username that is very similar to an existing active or inactive but significant user, and in this case, we have had another user with the Silverdragon name. As such, you must request a new and different username. When you have thought of a new name, contact Toomai and tell him the new name you want. Omega Tyrant 
04:13, 30 November 2013 (EST)