title: rake db:load doesn't work
body: <p>I'm totaly noob in Ruby, and I can't execute the command <code>rake db:load</code>. Sorry for stupid question, but I need help.
  The same error is thrown on <code>rake db:seed</code></p>
  
  <pre><code>root@root:/var/www/dir# rake db:load --trace
  rake aborted!
  Don't know how to build task 'db:load'
  /usr/lib/ruby/gems/1.8/gems/rake-10.0.4/lib/rake/task_manager.rb:49:in `[]'
  /usr/lib/ruby/gems/1.8/gems/rake-10.0.4/lib/rake/application.rb:142:in `invoke_task'
  /usr/lib/ruby/gems/1.8/gems/rake-10.0.4/lib/rake/application.rb:101:in `top_level'
  /usr/lib/ruby/gems/1.8/gems/rake-10.0.4/lib/rake/application.rb:101:in `each'
  /usr/lib/ruby/gems/1.8/gems/rake-10.0.4/lib/rake/application.rb:101:in `top_level'
  /usr/lib/ruby/gems/1.8/gems/rake-10.0.4/lib/rake/application.rb:110:in `run_with_threads'
  /usr/lib/ruby/gems/1.8/gems/rake-10.0.4/lib/rake/application.rb:95:in `top_level'
  /usr/lib/ruby/gems/1.8/gems/rake-10.0.4/lib/rake/application.rb:73:in `run'
  /usr/lib/ruby/gems/1.8/gems/rake-10.0.4/lib/rake/application.rb:160:in `standard_exception_handling'
  /usr/lib/ruby/gems/1.8/gems/rake-10.0.4/lib/rake/application.rb:70:in `run'
  /usr/lib/ruby/gems/1.8/gems/rake-10.0.4/bin/rake:33
  /usr/bin/rake:23:in `load'
  /usr/bin/rake:23
  </code></pre>