Adding prophecies to my NF account

I just got prophecies today, noticed a cheap deal on an online shop

I bought NF on realease, and its the only GW game i have

How do i add prophecies to my current account ?
I remember reading about people having problems adding various games to their account, and instead got it on a new account etc a while back, so i want to make sure i get this right

Login and there should be an ADD ACCESS KEY link under your login Then you ADD your key to an existing account.

Thank you

If anyone else ever has any questions about adding Access Keys to accounts, there's a handy little guide.