Getting Term::Visual to work (require 'eventmanager' failing

I am looking at something called Term::Visual which does not have a gem.
Trying to get it to work. After doing ruby setup.rb (config , setup and
then install) into /opt/local it still is looking for “eventmanager”.
However, there seems to be no gem or anything else in ruby called

gem_original_require': no such file to load -- eventmanager (LoadError) from /opt/local/lib/ruby/vendor_ruby/1.8/rubygems/custom_require.rb:27:inrequire’
from /opt/local/lib/ruby/site_ruby/1.8/term/visual.rb:4
gem_original_require' from /opt/local/lib/ruby/vendor_ruby/1.8/rubygems/custom_require.rb:27:inrequire’
from ex2.rb:2

I am running the sample programs to see what it offers.

Background: I am quite new to ruby. Have been playing around with curses
(basic) then thought I would see what all is already available that
could help me get more out of ncurses. So I’ve got ncurses gem installed
– OK.

Most rubyforge curses projects have not released any files as yet.