Screenname

Hi! Is there any possibility to change my screenname on these forums? It is generated automatically by the system, using the first part of the user’s e-Mail adress. (The part left from the “@”.) When i go into my account settings, i see the square for “screenname”, but the system won’t let me edit it manually and therefore i can’t change it.

Nevermind, i found out how to do it: IF i change the nickname, the new nickname is included in the list for options in “screenname”