Layouts in ActionMailer

Hiya

I am having loads of trouble adding layouts to my emails in rails 2.2.

I created a layout app/views/layouts/notifier.html.erb and this layout was used for all my emails regardless of content type. All was well.

But I want to create a different layout for the different content types (text/html, text/plain)

In which case I made app/views/layout/notifier.text.html.erb and app/ views/layouts/notifier.text.plain.erb

as described here http://guides.rubyonrails.org/action_mailer_basics.html#action-mailer-layouts

class Notifier < ActionMailer::Base

  layout 'notifier'

  def reminder      ...      content_type 'text/html'      ...   end end

Now it won't render either layout. I get the error

ActionView::MissingTemplate (Missing layout layouts/notifier.erb in view path /home/rails/test/app/views:):     /opt/csw/lib/ruby/gems/1.8/gems/actionpack-2.2.2/lib/action_view/ template.rb:95:in `find_full_path'

Has anyone got any ideas?? I'd be very grateful