New Problem for making Korean WarRock accounts

Edit for the third time:

Now I really DO have a problem, Everytime I choose a nickname something's wrong with it...

It says the following error:

넥슨 닉네임 정책이 변경되어 기존 별명이 변경이 불가능한
고유 닉네임으로 전환되었습니다.

Any1 knows what it means?? I translated it to English with altavista, its says:

"The neck sun the nickname policy was changed and the existing nickname was converted with the specific nickname where the fringe land is impossible."

What do they mean with it?? Anybody knows it??

EDIT 4th TIME: PROBLEM SOLVED AGAIN xD Jesus, why am I asking u guys if I can do it all myself xD!!

You are netherlands,

Can you make a tutorial for me to make it or,
gif me one :P

dnakje :P