title: todolist rake aborted! no such file to load -- dispatcher
body: <p>Trying to install <a href="https://github.com/dalyons/redmine-todos-scrum-plugin" rel="nofollow noreferrer">https://github.com/dalyons/redmine-todos-scrum-plugin</a> plugin, but when im doing:</p>
  
  <pre><code>rake db:migrate_plugins RAILS_ENV=production 
  </code></pre>
  
  <p>there is an error occured:</p>
  
  <pre><code>rake aborted!
  no such file to load -- dispatcher
  
  Tasks: TOP =&gt; db:migrate_plugins =&gt; redmine:plugins:migrate =&gt; environment
  </code></pre>
  
  <p>And with trace:</p>
  
  <pre><code>rake db:migrate_plugins RAILS_ENV=production -trace
  rake aborted!
  no such file to load -- ace
  /usr/local/lib/ruby/site_ruby/1.8/rubygems/custom_require.rb:36:in `gem_original_require'
  /usr/local/lib/ruby/site_ruby/1.8/rubygems/custom_require.rb:36:in `require'
  /usr/local/lib/ruby/gems/1.8/gems/rake-0.9.2.2/lib/rake/application.rb:357:in `standard_rake_options'
  /usr/local/lib/ruby/1.8/optparse.rb:1298:in `call'
  /usr/local/lib/ruby/1.8/optparse.rb:1298:in `parse_in_order'
  /usr/local/lib/ruby/1.8/optparse.rb:1254:in `catch'
  /usr/local/lib/ruby/1.8/optparse.rb:1254:in `parse_in_order'
  /usr/local/lib/ruby/1.8/optparse.rb:1248:in `order!'
  /usr/local/lib/ruby/1.8/optparse.rb:1339:in `permute!'
  /usr/local/lib/ruby/1.8/optparse.rb:1360:in `parse!'
  /usr/local/lib/ruby/gems/1.8/gems/rake-0.9.2.2/lib/rake/application.rb:425:in `handle_options'
  /usr/local/lib/ruby/gems/1.8/gems/rake-0.9.2.2/lib/rake/application.rb:74:in `init'
  /usr/local/lib/ruby/gems/1.8/gems/rake-0.9.2.2/lib/rake/application.rb:133:in `standard_exception_handling'
  /usr/local/lib/ruby/gems/1.8/gems/rake-0.9.2.2/lib/rake/application.rb:72:in `init'
  /usr/local/lib/ruby/gems/1.8/gems/rake-0.9.2.2/lib/rake/application.rb:64:in `run'
  /usr/local/lib/ruby/gems/1.8/gems/rake-0.9.2.2/lib/rake/application.rb:133:in `standard_exception_handling'
  /usr/local/lib/ruby/gems/1.8/gems/rake-0.9.2.2/lib/rake/application.rb:63:in `run'
  /usr/local/lib/ruby/gems/1.8/gems/rake-0.9.2.2/bin/rake:33
  /usr/local/bin/rake:23:in `load'
  /usr/local/bin/rake:23
  </code></pre>
  
  <p>GEM ENV:</p>
  
  <pre><code>RubyGems Environment:
    - RUBYGEMS VERSION: 1.8.24
    - RUBY VERSION: 1.8.7 (2012-02-08 patchlevel 358) [amd64-freebsd7]
    - INSTALLATION DIRECTORY: /usr/local/lib/ruby/gems/1.8
    - RUBY EXECUTABLE: /usr/local/bin/ruby18
    - EXECUTABLE DIRECTORY: /usr/local/bin
    - RUBYGEMS PLATFORMS:
      - ruby
      - amd64-freebsd-7
    - GEM PATHS:
       - /usr/local/lib/ruby/gems/1.8
       - /home/redmine/gems
    - GEM CONFIGURATION:
       - :update_sources =&gt; true
       - :verbose =&gt; true
       - :benchmark =&gt; false
       - :backtrace =&gt; false
       - :bulk_threshold =&gt; 1000
       - "gem" =&gt; "--no-ri --no-rdoc"
    - REMOTE SOURCES:
       - http://rubygems.org/
  </code></pre>
  
  <p>And redmine v2.1.0.</p>
  
  <p>Any help?</p>