unit tests hosed after installing memcache on windows

rubyonrails-talk
1

I installed memcache on my windows machine ('cached_model') and am now getting the following error when I run any of my unit tests:

undefined method `use_transactional_fixtures=' for Test::Unit::TestCase:Class (NoMethodError)

The root cause of the pproblem seems to originate from this inside my environment.rb file. require 'cached_model'. If I remove this line, all is good. Of course I don't want to do this...

Everything I did originated from this article: http://nubyonrails.com/articles/2006/08/17/memcached-basics-for-rails

Any ideas?

thanks, phil