Here is a link to a thread that gives instructions on what to do.
http://forum.naruto.oasgames.com ... d=892&fromuid=78701
Try those steps and if it doesn't work from what the thread says; PM Daiske informing him that you can't change it still.
Just to try it out for you, I did the exact steps listed and got the avatar to work. ^^
This post was last edited by Ningishzida at 2016-9-24 11:25