with the new Tour system incorporated into the Forum, you don't have a separate Tour nickname anymore.
Thus for the time being, you can only change your Forum nickname to match your old Tour nickname.
If your old Tour nickname is different from your Forum nickname :
1- if you want to keep your Forum nickname, then you should state this here : topic13-4669.php
(Mods will need to know that to handle the rankings)
2- if you want to keep your old Tour nickname, then state it in this topic, so I'll change your Forum nickname (don't forget to clearly state your Tour nickname