Activating an ArenaNet key is really easy, just follow these simple steps:
1.Sign in to the Account Management site with your ArenaNet profile.
2.Click on the Redeem a Code button that you see on the Overview site.
3.Put the key into the Enter Registration Code.
4.Click the Submit button to activate the key, and the content will be automatically added to your account.
The key is not working
If you have activated the key according to the guide but the code appears not to work, please check what type of error message you receive and depending on it follow the appropriate instructions: