Vai em configs/functions/developer.properties
Define character name template
# Example to use only : CnameTemplate=[A-Z][a-z]{3,3}[A-Za-z0-9]*
# will allow names with first capital letter, next three small letters,
# and any (capital or not) letter or number, like ZbigN1eW
# Most rational to have CnameTemplate=[A-Z][a-z]*
# meaning names only of letters with first one capital, like Zbigniew
# Default .* - any namy of any symbols
CnameTemplate = .*
PetNameTemplate = .*
ClanNameTemplate = .*
AllyNameTemplate = .*
Mude .* para [A-Z][a-z]{3,3}[A-Za-z0-9]*
Depois vai em configs/protected/others.properties
# Check the characters Nick name on login
# IMPORTANT: Put True for server security.
CheckNameOnEnter = False
Se estiver True,coloque False