im having problems with adding a collectors edition access key to my account

im trying to add a prophecies collectors edition key but when i try to add the access key to get the "divine aura" in game feature the game says it can not add it because i will already have the rights this key provides, what must i do to get the divine aura?

i previously have the guild wars special edition and the guild wars factions collectors edition on my account

any help will be much appreciated thank you.

type /gift