--- a/app/controllers/order_items_controller.rb	Mon Mar 10 09:55:26 2008 +0900
+++ b/app/controllers/order_items_controller.rb	Mon Mar 10 11:04:49 2008 +0900
@@ -91,6 +91,7 @@ class OrderItemsController < Application
 	@order = Order.find(session[:order_id])
       else
 	@order = Order.create
+        session[:order_id] = @order.id
       end
     end
 end