Redmine

I try to follow the instructions at http://www.redmine.org/projects/redmine/wiki/HowTo_Install_Redmine_in_a_sub-URI and have a local redmine installation serving at port 3000 with a URL prefix /redmine2. Later on I want to proxy this server via apache to /redmine2 on port 80.

Setting the relative_url_root to /redmine2 results in a "Redmine 404 error" page for the URL: http://localhost:3000/redmine2/ (Browser Cache is disabled).

Calling http://localhost:3000/ results in a "correct" page without layout... looking at the source:
All of the java script, atom and css links seem to be prefixed correctly with /redmine2, but not found there.

Sadly the redmine pages related links (like /projects, /my/page or /admin) are not prefixed.

I don't know how to make use of this behaviour. So I feel a bit "lost" (as promised in the opening paragraph of the HowTo).

This is the config/environment.rb file

# Load the rails application
require File.expand_path('../application', __FILE__)

# Make sure there's no plugin in vendor/plugin before starting
vendor_plugins_dir = File.join(Rails.root, "vendor", "plugins")
if Dir.glob(File.join(vendor_plugins_dir, "*")).any?
  $stderr.puts "Plugins in vendor/plugins (#{vendor_plugins_dir}) are no longer allowed. " +
    "Please, put your Redmine plugins in the `plugins` directory at the root of your " +
    "Redmine directory (#{File.join(Rails.root, "plugins")})" 
  exit 1
end

# Initialize the rails application
RedmineApp::Application.initialize!
Redmine::Utils::relative_url_root = "/redmine2" 

restarting with mongrel:

#> ruby redmine-2.0/script/rails server mongrel -d -e production -p 3000
=> Booting Mongrel
=> Rails 3.2.5 application starting in production on http://0.0.0.0:3000

Some version infos (as provided on the Admin->Information page)

Environment:
  Redmine version                          2.0.2.stable.9774
  Ruby version                             1.8.7 (x86_64-linux)
  Rails version                            3.2.5
  Environment                              production
  Database adapter                         MySQL
Redmine plugins:
  no plugin installed