Error running Selenium rakefile with Rails 2.3.4

Hi all,

I want to get started with Selenium for testing Ajax. I followed the
installation instructions on http://seleniumhq.org/projects/on-rails/
but get an error when running the rakefile in step 4. I get this
error: “uninitialized constant ActionView::Base::Helpers (NameError)”
The full output is here: http://pastie.org/641664

The only mention of this error I could find on the web is here:
http://en.blog.improveit.com.br/articles/2009/03/27/new-selenium-on-rails-is-out
but the fix presented in the comments there had no effect for me.

I had the impression that Selenium was a very popular and commonly
used tool in the Rails community so I was surprised it didn’t just
work out of the box and that I haven’t found any other mention of the
error. Has anyone seen this before? Any idea what to try? Thanks in
advance.