Our replacement for schema.rb dump/load

databases.rake

namespace :db do
  namespace :structure do
    desc "Dump the database structure to a SQL file"
    task :dump => :load_config do
      config = ActiveRecord::Base.configurations[Rails.env]

      command = "mysqldump -u #{config["username"]} #{config["database"]} --no-data --skip-comments --skip-add-drop-table > db/#{Rails.env}_structure.sql"
      puts "Running: #{command}"
      system command

      command = "mysqldump -u #{config["username"]} #{config["database"]} --skip-extended-insert --no-create-info --skip-comments --tables schema_migrations >> db/#{Rails.env}_structure.sql"
      puts "Running: #{command}"
      system command
    end
  end
end

namespace :db do
  namespace :test do
    desc "Load the test database from a SQL file"
    task :prepare => "db:load_config" do
      config = ActiveRecord::Base.configurations["test"]

      command = "mysqladmin -u #{config["username"]} drop -f #{config["database"]}"
      puts "Running: #{command}"
      system command

      command = "mysqladmin -u #{config["username"]} create #{config["database"]}"
      puts "Running: #{command}"
      system command

      command = "mysql -u #{config["username"]} #{config["database"]} < db/development_structure.sql"
      puts "Running: #{command}"
      system command
    end
  end
end

For a rails 2.3 project, i have put this file in the lib/tasks directory, but rails is not picking it up. When i run rake db:test:prepare, its running the old one. Can you tell me how you've hooked it up?