text_field_with_auto_complete undefined method error

Can anyone help me out why im getting this error: "undefined method `text_field_with_auto_complete' for #<ActionView::Base:0x2472460>"

I been trying to follow a tutorial here => http://ricardo.pacheco.name/blog/articles/2006/09/17/using-autocomplete-with-belongs_to-fields-part-ii

and cant cant anything working because of this error.

Im using Raisl 2.0.2

VIEW <% form_tag :action => 'create' do %>     <%= text_field_with_auto_complete('suburb', 'name', { :size => 40 }, { :after_update_element => 'auto_complete_on_select' }) %>     ....(more fields)....     <%= submit_tag "Create" %> <% end %>

CONTROLLER   def auto_complete_for_suburb_name     find_options = {       :conditions => [ "LOWER(name) LIKE ?", params[:suburb] [:name].downcase + '%' ],       :order => "name ASC",       :limit => 10     }     @suburbs = Suburb.find(:all,find_options)     render :inline => "<%= indexed_auto_complete_result @suburbs, 'business_suburb_id', 'name', 'id' %>"   end

any ideas?

ahh ok cool thanks for that.