can not find mysql/tokenizer

[Richard Shade]

I am using version mysql-proxy-0.8.0-linux-rhel5-x86-32bit on CentOS 5.5. I have copied the files to prefix=/usr/. I have created a config in /etc/mysql-proxy.cnf
----
[mysql-proxy]
event-threads = 1
max-open-files = 1024
log-file = /var/log/mysql-proxy.log
log-level = debug
lua-cpath = /usr/lib/mysql-proxy/lua/?.lua
lua-path = /usr/lib/mysql-proxy/lua/?.lua
plugin-dir = /usr/lib/mysql-proxy/plugins/
plugins=proxy,debug,admin,replicant
pid-file = /var/run/mysql-proxy.pid
proxy-address = :4040
proxy-backend-addresses = 192.168.0.1:3306, 192.168.0.2:3306
proxy-read-only-backend-addresses = 192.168.0.3:3306, 192.168.0.4:3306
proxy-lua-script = /usr/share/doc/mysql-proxy/rw-splitting.lua

----

and execute mysql proxy /usr/bin/mysql-proxy --defaults-file=/etc/mysql-proxy.cnf --daemon. I get the following error when using rw-splitting.lua.

2010-06-22 23:01:46: (critical) (lua-error) [/usr/lib/mysql/lua/rw-splitting.lua]
/usr/lib/mysql-proxy/lua/proxy/tokenizer.lua:20: module 'mysql.tokenizer' not found:
no field package.preload['mysql.tokenizer']
no file '/usr/lib/mysql-proxy/lua/mysql/tokenizer.lua'
no file '/usr/lib/mysql-proxy/lua/mysql/tokenizer.lua'
no file '/usr/lib/mysql-proxy/lua/mysql.lua'
2010-06-22 23:01:46: (critical) (lua-error) [/usr/lib/mysql/lua/rw-splitting.lua]
Anyone know how to solve this?