Rss feeds not working help

I had created two rss feeds and they were working perfectly the other
day but for some reason they now show in an xml tree format when
displayed.

controller:
def rss
      @products = Product.find(:all, :order=> "item_name")
      render :layout => false
      end

view:
xml.instruct!

xml.rss "version" => "2.0", "xmlns:dc" => "http://purl.org/dc/elements/
1.1/" do
  xml.channel do

   xml.title "FlashItem products"
   xml.link url_for :only_path => false, :controller =>
'products'
   xml.description "Items advertised on the FlashItems website"

    @products.each do |p|
     xml.item do
      xml.title(p.item_name)
      xml.link(url_for :only_path => false, :controller =>
'products',:action => 'show', :id => (p.id))
      xml.description(p.description)
      xml.guid(url_for :only_path => false, :controller => 'products',
:action => 'show', :id => (p.id))
      xml.pubDate(CGI.rfc1123_date p.updated_at)
     end
    end
  end
end

could something be wrong with the http://purl.org/dc/elements/
1.1/ url bit that I believe does the formatting of the feed?