Darkfish rdoc sees no rdoc

Hi, I have trouble with rdoc. I run ruby 1.9.2p290 and I installed
When I run its rdoc on a directory that only contains this file test.rb:

=begin rdoc
== test - This is a test
=== Description
I’m trying to generate documentation from this file.
puts ‘Hello World!’

then I get a doc directory which does not contain any information from
between the =begin and =end.
There are two html files: index.html and table_of_contents.html.
I have attached the output as seen in my web browser.
What am I doing wrong?