how to fix the following error : undefined method `PUT' for #<ActionDispatch::Routing:: Mapper:0x3f8ee48> in rails 3.2?

I am currently trying to create a shopping cart for my rails application and once populated my cart should be saved in the session.

Everytime i try to run the server to test if working or not, it seems my routes are not working at all...

See below my routes.rb, my cart controller and my index.

Any help will be appreciated.

routes.rb

    Sewingsupplies::Application.routes.draw do
  get "cart/index"

  get "cart/success"

  PUT "/cart/:id" => "cart#add"
  DELETE "/cart/:id" => "cart#remove"
  DELETE "/cart" => "cart#clear"
  POST "/cart/checkout"

  devise_for :admins

  resources :catalogues


  devise_for :users

cart controller

      def index
        sessions[:cart] = {}
        render 'cart/index'
      end

      def success
      end


      def add

        @catalogue = Catalogue.find(params[:id])
        cart = sessions[:cart]
        cart = {:catalogue => @catalogue.name,category => @catalogue.category, :code => @catalogue.code , :colour=> @catalogue.colour, :description => @catalogue.description, :image  => @catalogue.image , :unitprice => += @catalogue.unitprice, :unitquantity => +=1, :unitweight => += @catalogue.unitweight }
        sessions[:cart] = cart
        render 'cart/add'
      end
end

and my index page

<h1>Listing catalogues</h1>

<table>
  <tr>
    <th>Name</th>
    <th>Code</th>
    <th>Category</th>
    <th>Description</th>
    <th>Unitprice</th>
    <th>Unitquantity</th>
    <th>Unitweight</th>
    <th>Colour</th>
    <th>Image</th>
    <th>User</th>
    <th></th>
    <th></th>
    <th></th>
    <th></th>
  </tr>

<% @catalogues.each do |catalogue| %>
  <tr>
    <td><%= catalogue.name %></td>
    <td><%= catalogue.code %></td>
    <td><%= catalogue.category %></td>
    <td><%= catalogue.description %></td>
    <td><%= catalogue.unitprice %></td>
    <td><%= catalogue.unitquantity %></td>
    <td><%= catalogue.unitweight %></td>
    <td><%= catalogue.colour %></td>
    <td><%= image_tag(catalogue.image, :width => 150) if catalogue.image.present?%></td>
    <td><%= catalogue.user.email %></td>
    <td><%= link_to 'Show', catalogue %></td>
    <td><%= link_to 'Edit', edit_catalogue_path(catalogue) %></td>
    <td><%= link_to 'Destroy', catalogue, method: :delete, data: { confirm: 'Are you sure?' } %></td>
    <td><%= link_to "Add to cart", controller: "cart", action: "add", id: @catalogue.id, method: :post %></td>
  </tr>
<% end %>
</table>

<br />
<%= link_to "View cart", controller: "cart", action: "index" %>

<%= link_to 'New Catalogue', new_catalogue_path %>