title: Can't start rails server - sqlite3 adapter error
body: <p>I'm trying to teach myself ruby on rails and I'm trying to create a simple application to start with. I'm following the tutorial at <a href="http://guides.rubyonrails.org/getting_started.html#creating-a-new-rails-project" rel="nofollow">http://guides.rubyonrails.org/getting_started.html#creating-a-new-rails-project</a> but am having difficulty starting the server. When I try start up the server and go to the localhost, </p>
  
  <pre><code>Could not load 'active_record/connection_adapters/sqlite3_adapter'. Make sure that the adapter in
  config/database.yml is valid. If you use an adapter other than 'mysql', 'mysql2', 'postgresql' or
  'sqlite3' add the necessary adapter gem to the Gemfile.
  </code></pre>
  
  <p>I'm tried to look up a solution/reason why this happens on other questions but to no avail.</p>
  
  <p>My Gemfile looks like this</p>
  
  <pre><code>source 'https://rubygems.org'
  
  # Bundle edge Rails instead: gem 'rails', github: 'rails/rails'
  gem 'rails', '4.1.6'
  # Use sqlite3 as the database for Active Record
  gem 'sqlite3'
  # Use SCSS for stylesheets
  gem 'sass-rails', '~&gt; 4.0.3'
  # Use Uglifier as compressor for JavaScript assets
  gem 'uglifier', '&gt;= 1.3.0'
  # Use CoffeeScript for .js.coffee assets and views
  gem 'coffee-rails', '~&gt; 4.0.0'
  # See https://github.com/sstephenson/execjs#readme for more supported runtimes
  # gem 'therubyracer',  platforms: :ruby
  
  # Use jquery as the JavaScript library
  gem 'jquery-rails'
  # Turbolinks makes following links in your web application faster. Read more:
  https://github.com/rails/turbolinks
  gem 'turbolinks'
  # Build JSON APIs with ease. Read more: https://github.com/rails/jbuilder
  gem 'jbuilder', '~&gt; 2.0'
  # bundle exec rake doc:rails generates the API under doc/api.
  gem 'sdoc', '~&gt; 0.4.0',          group: :doc
  
  # Use ActiveModel has_secure_password
  # gem 'bcrypt', '~&gt; 3.1.7'
  
  # Use unicorn as the app server
  # gem 'unicorn'
  
  # Use Capistrano for deployment
  # gem 'capistrano-rails', group: :development
  
  # Use debugger
  # gem 'debugger', group: [:development, :test]
  
  # Windows does not include zoneinfo files, so bundle the tzinfo-data gem
  gem 'tzinfo-data', platforms: [:mingw, :mswin]
  </code></pre>
  
  <p>I'm using 
  Ruby 2.1.3</p>
  
  <p>and when I type </p>
  
  <blockquote>
    <p>gem list</p>
  </blockquote>
  
  <p>I find I'm running 
  rails 4.1.6
  sqlite3 (1.3.9 x86-mingw32)</p>
  
  <p>Can anyone point me in the right direction?</p>