Problem with path helepers on nested routes


I have problem with this part of routes.rb

map.namespace :admin do |admin|      admin.resources :segment_schemas, :except => :show      admin.resources :languages      admin.resources :projects do |project|           project.resources :blocks           project.resources :sections           project.resources :menus, :has_many => [:menu_items]           project.resource :language           project.resources :skin      end      admin.resources :clients, :has_many => [ :projects ]      admin.resources :skins


while using this template :

<% for menu in @menus %>   <tr>     <td><%=h menu.segment %></td>     <td><%=h menu.title %></td>   15. <td><%= link_to 'show', [:admin,@project,menu] %></td>   16. <td><%= link_to 'edit', edit_admin_project_menu_path(menu) %></

  17. <td><%= link_to 'delete', menu, :confirm => 'Are you sure?', :method => :delete %></td>   </tr> <% end %> </table>

<br />

<%= link_to 'New menu', new_admin_project_menu_path(@project) %>[/ code]

it throws out :

Showing app/views/admin/menus/index.html.erb where line #16 raised: edit_admin_project_menu_url failed to generate from {:controller=>"admin/menus", :action=>"edit", :project_id=>1}, expected: {:controller=>"admin/menus", :action=>"edit"}, diff: {:project_id=>1}

I tried to define various parameters for routes but it just don't work :confused: