Well that was embarrassing. I just realized I have to connect using the root user, as the name of the plugin suggests.
$ ssh root@192.168.1.3 root@192.168.1.3's password: Last login: Fri Sep 13 20:30:42 2013 from 192.168.1.16 on pts/0 Linux leviathan 2.6.37.6.RNx86_64.2.4 #1 SMP Thu Jul 26 05:00:36 PDT 2012 x86_64 GNU/Linux leviathan:~#