how to change the mysql default-charset

[frankie328]

i can't change the default_charset
if this ways is can't change
can anyone can help me to recompiling the mysql

shell>mysqld
[Warning] Asked for 196608 thread stack, but got 126976
060119 1:40:50 [ERROR] Can't start server: Bind on TCP/IP port: Address already in use
060119 1:40:50 [ERROR] Do you already have another mysqld server running on port: 3306 ?
060119 1:40:50 [ERROR] Aborting
060119 1:40:50 [Note] mysqld: Shutdown complete

shell>mysqld --default-character-set=big5 \
--default-collation=big5_chinese_ci060119 1:42:02 [Warning] Asked for 196608 thread stack, but got 126976
060119 1:42:02 [ERROR] Can't start server: Bind on TCP/IP port: Address already in use
060119 1:42:02 [ERROR] Do you already have another mysqld server running on port: 3306 ?
060119 1:42:02 [ERROR] Aborting

060119 1:42:02 [Note] mysqld: Shutdown complete