Engine Newbie: Problem w/ script/plugin discover

I would like to install The Ruby Engines plugin. So, I followed the
directions at:
http://www.rails-engines.org/download

When I run script/plugin discover, I get the following:

Add http://svn.northpub.com/plugins/? [Y/n]
(eval):3:in each': undefined method []’ for nil:NilClass
(NoMethodError)
from
c:/ruby/lib/ruby/gems/1.8/gems/rails-1.1.2/lib/commands/plugin.rb:6
58:in scrape' from c:/ruby/lib/ruby/gems/1.8/gems/rails-1.1.2/lib/commands/plugin.rb:6 32:in parse!’
from
c:/ruby/lib/ruby/gems/1.8/gems/rails-1.1.2/lib/commands/plugin.rb:6
31:in parse!' from c:/ruby/lib/ruby/gems/1.8/gems/rails-1.1.2/lib/commands/plugin.rb:4 47:in parse!’
from
c:/ruby/lib/ruby/gems/1.8/gems/rails-1.1.2/lib/commands/plugin.rb:4
63:in parse!' from c:/ruby/lib/ruby/gems/1.8/gems/rails-1.1.2/lib/commands/plugin.rb:8 71 from c:/ruby/lib/ruby/site_ruby/1.8/rubygems/custom_require.rb:21:in re
quire’
from
c:/ruby/lib/ruby/gems/1.8/gems/activesupport-1.3.1/lib/active_suppo
rt/dependencies.rb:147:in `require’
from script/plugin:3

Am I missing something obvious? Does someone know how to get around
this?

I am running on Windows XP, wiht Subversion installed, with Ruby 1.8.4
and Rails 1.1.2.

Thanks in advance,

Scott T.