ejabberd with websocket

I'm newbie so please bear with me.

Setup ejabberd on ubuntu 12.04 its working fine. But when i tried using https://github.com/superfeedr/ejabberd-websockets ejabberd-websockets getting following error.

=INFO REPORT==== 2014-02-11 15:27:04 ===
inet_parse:"/etc/hosts":10: erroneous line, SKIPPED

=INFO REPORT==== 2014-02-11 15:27:04 ===
I(<0.37.0>:cyrsasl_digest:44) : FQDN used to check DIGEST-MD5 SASL authentication: "ubuntu"

=ERROR REPORT==== 2014-02-11 15:27:04 ===
C(<0.37.0>:gen_mod:75) : Problem starting the module mod_websocket for host "prashant.im"
options: []
error: undef

=ERROR REPORT==== 2014-02-11 15:27:04 ===
C(<0.37.0>:gen_mod:80) : ejabberd initialization was aborted because a module start failed.

Can anyone help me on this.