eventually I got it successfully.
now i show my experience :
1 when create database, it should use utf-8 for database.
2 if you use mysql, please make sure the below as well as:
[mysql]
default-character-set=utf8
# The default character set that will be used when a new schema or table is
# created and no character set is defined
default-character-set=utf8
i think this is very important for setup jforum procedure.
just point from my view.
anyone has more good suggestion, it will be more appreciate.
[originally posted on jforum.net by king3382]