Redmine

Hi Forum!

I have problems to get redmine work with apache webserver.
I installed redmine 0.9 and it just works fine with webrick server.

Now I want it to run from apache. I followed the instructions as the are described in the howto-section.
But when I call public/dispatch.cgi I get the following error message:

macmini:redmine-0.9 admin$ public/dispatch.cgi
/Library/Ruby/Gems/1.8/gems/activesupport-2.3.5/lib/active_support/whiny_nil.rb:52:in `method_missing': undefined method `env_table' for nil:NilClass (NoMethodError)
    from /Library/Ruby/Gems/1.8/gems/actionpack-2.3.5/lib/action_controller/cgi_process.rb:22:in `__send__'
    from /Library/Ruby/Gems/1.8/gems/actionpack-2.3.5/lib/action_controller/cgi_process.rb:22:in `dispatch_cgi'
    from /Library/Ruby/Gems/1.8/gems/actionpack-2.3.5/lib/action_controller/dispatcher.rb:101:in `dispatch_cgi'
    from /Library/Ruby/Gems/1.8/gems/actionpack-2.3.5/lib/action_controller/dispatcher.rb:27:in `dispatch'
    from public/dispatch.cgi:13
macmini:redmine-0.9 admin$

I tried to figure out what's wrong for the whole afternoon, but I can't find any hints that worked for me.
I have absolutely no clue about ruby, I just want to use redmine.
It would be great if someone could point me into the right direction.

OS X 10.6.2
Apache 2.2.13
ruby 1.8.7
rails 2.3.5

my dispatch.cgi looks like:

#!/usr/bin/env ruby

require File.dirname(__FILE__) + "/../config/environment" unless defined?(RAILS_ROOT)

require "dispatcher" 
# require "/Library/Ruby/Gems/1.8/gems/rails-2.3.5/lib/dispatcher.rb" 

ADDITIONAL_LOAD_PATHS.reverse.each { |dir| $:.unshift(dir) if File.directory?(dir) } if defined?(Apache::RubyRun)
Dispatcher.dispatch

many thanks in advance!
cheers,
spog