webmin Module configuration error: The command /etc/init.d/named

Hi everyone,
I want to setup a Ubuntu 12.04lts Bind9 + B9ddns Server using Dynamic Ip with Webmin 1.30. ? after I install b9ddns module in webmin it give me this error : Module configuration error: The command /etc/init.d/named could not be found on your system.
Can anyone please help or is there any better solutions ? I want to host my website using Dynamic Ip.