no such file to load -- linguistics.rb

hi
i want to convert no to words so using linguistics.rb;
while using it linguistics.rb
i am receiving an error

no such file to load -- linguistics.rb

i have installed gem for it
linguistics <1.0.8>

code=>
require 'linguistics.rb'
Linguistics::use( :en )

any fix?

Require statements do not use the .rb extension - try that.

--Matt Jones

Unless you are using Ruby 1.9 you need to require 'rubygems' in order
to load gems.

You can do this either in the code itself or via a command line argument to ruby

$ ruby -e'require "rubygems";p require "linguistics.rb"'
-e:1:in `require': no such file to load -- linguistics.rb (LoadError)
  from -e:1

$ruby -rubygems -e'p require "linguistics.rb"'
true

$ruby -e'require "rubygems";p require "linguistics.rb"'
true