Unable to install Ajemti on ubuntu 12.10

I am trying to install Ajemti as mentioned on ubuntu 12.10.

wget http://repo.ajenti.org/debian/key -O- | apt-key add -

echo "deb http://repo.ajenti.org/debian main main" >> /etc/apt/sources.list

apt-get update

apt-get install ajenti

But I am getting following errors:

After this operation, 0 B of additional disk space will be used.

Do you want to continue [Y/n]? y

Setting up ajenti (0.6.3) ...

update-rc.d: /etc/init.d/ajenti: file does not exist

Loading plugins

21.06.2013 14:52 INFO  Plugins loaded.

Downloading plugin list

Upgrading Ajenti plugins

Done

/var/lib/dpkg/info/ajenti.postinst: 10: /var/lib/dpkg/info/ajenti.postinst: /etc/init.d/ajenti: not found

dpkg: error processing ajenti (--configure):

 subprocess installed post-installation script returned error exit status 127

Processing triggers for python-support ...

Errors were encountered while processing:

 ajenti

E: Sub-process /usr/bin/dpkg returned an error code (1)

Please guide me how can I troubleshoot this.