[Rails] routes issues with rails3

Here i am using *rails3*, here the view.html.erb form have one login
button, so when i click on that button, gives no routes matches :controller
=> 'home', :action => 'login'. But i have put that in routes.rb. Why this
happening?

*view.html.erb*

<%= form_tag( { :controller => 'home', :action => 'login' }, { :method => 'post'}) do %>
<%= text_field(:name, :name, :class => "span2",:placeholder => "Username") %>
<%= password_field_tag(:password, :password, :class =>"span2") %>
<%= submit_tag "Login", :class => "btn btn-primary" %>
<% end %>
routes.rb


resources :home do
post :login, :on => :member
end

homecontroller.rb

class HomeController < ApplicationController
def login

end
end