Make sure you install the Rails 2.1 branch of Active Scaffold:
git clone git://github.com/activescaffold/active_scaffold
git branch -r (just lists the branches)
git checkout origin/rails-2.1
(Check out the full thread for Rails 2.1 and Active Scaffold compatibility)
Second, I had to patch
vendor/plugins/active_scaffold/lib/extensions/generic_view_path.rb. On line 53, make it look like this:
if !@template.controller.is_a?(ActionMailer::Base) && @template.controller.class.uses_active_scaffold?
I had to add
All my tests are now passing!
I still love Active Scaffold, even though it's a bit behind the times.