Can't link guild wars account to NC Soft account

Since I first tried a couple of months ago, I have never been able to link my Guild Wars account to my NC Soft Master account. Every time, the key comes up as invalid.
Just to clarify, do you use the access key used to create the Guild Wars account, or the serial number of the game you bought?

Check those threads:
http://www.guildwarsguru.com/forum/s...php?t=10258190
http://www.guildwarsguru.com/forum/s...php?t=10117891

Ok - this is for you and anyone else who hasnt yet done ncsoft account or gw link.

http://www.guildwars.com/products/ex...orage_pane.php

Follow the instructions there and pay special notice to No3 as you have to give your gw account login name and your gw password - This is the only time you will be asked ever for account details unless you contact support.
Anet staff including regina and lindsey will verify this - never give account details to anyone online or on any site - common sense as you never know if they are going to steal your account

... =S it says my accoutn is already linked to a NCsoft account, but i dont remember that i ever linked the gw account to ncsoft.
any1 know how i cna find out to which account its linked?