title: Sinatra and Activerecord "cannot load such file -- sinatra/activerecord"
body: <p>I'm following Micheal Herman's post on Sinatra + PostgreSQL + Heroku, put keep running into an error</p>
  
  <pre><code>require 'sinatra/activerecord'
  </code></pre>
  
  <p>when I try to launch the app ($ ruby app.rb) or create my database ( $ rake db:create_migration NAME=...) I keep receiving the following error:</p>
  
  <pre><code>cannot load such file -- sinatra/activerecord
  </code></pre>
  
  <p>sinatra-activerecord-1.2.3 is in my gemlist. What am i missing?</p>