upgrade to rails3, but grip is broken

script/rails

@@ -0,0 +1,10 @@
+#!/usr/bin/env ruby
+# This command will automatically be run when you run "rails" with Rails 3 gems installed from the root of your application.
+
+ENV_PATH  = File.expand_path('../../config/environment',  __FILE__)
+BOOT_PATH = File.expand_path('../../config/boot',  __FILE__)
+APP_PATH  = File.expand_path('../../config/application',  __FILE__)
+ROOT_PATH = File.expand_path('../..',  __FILE__)
+
+require BOOT_PATH
+require 'rails/commands'