In your routes file you defined that you only wanted GET requests two
the states action. Currently it doesn't work since Prototype makes
POST requests by default. You have two opportunities:
B) Correct the link:
<%= link_to_remote "State Parties" , :url=>
states_parties_path, :update => {:success => 'parties_list'}, :method
=> :get %>
The ActionController::MethodNotAllowed error in general means that you
have attempted to call an action that is not allowed to be called with
that method. E.g. you can't POST to the show action, it only allows
GET.