Rails 3 - Issue with Nested Routes, It's not allow for a custom collection?

Question

Hello, I have the following in my routes.rb:

resources :projects do
  resources :photos, :permissions
    collection do
        get 'yourcurrentprojects', 'userprojectpermission'
    end
end

But when I do, projects/3/permissions/userprojectpermission i get a routing error: No route matches "/projects/3/permissions/userprojectpermission"

Did I define this wrong? Thank you for your help