mysql-5.1.42windows下启动错误

alahan

请大虾们赐教：
使用 mysqld --console启动mysql报如下错误。不知道是什么原因。
100130 21:48:13 [ERROR] mysqld: ambiguous option '--character_set=gbk' (characte
r-set-client-handshake, character-sets-dir)
100130 21:48:13 [ERROR] Aborting

我的mysql配置文件如下：
[client]
#password        = your_password
port                = 3307
socket                = /tmp/mysql.sock

# Here follows entries for some specific programs

# The MySQL server
[mysqld]
basedir=C:/mysql-5.1.42-win32
datadir=C:/mysql-5.1.42-win32/data
port                = 3307
socket                = C:/mysql-5.1.42-win32/tmp/mysql.sock
skip-locking
key_buffer_size = 16M
max_allowed_packet = 1M
table_open_cache = 64
sort_buffer_size = 512K
net_buffer_length = 8K
read_buffer_size = 256K
read_rnd_buffer_size = 512K
myisam_sort_buffer_size = 8M
default-character-set=gbk


配置中去掉：default-character-set=gbk   这个语句也不行