Redmine

Hello everybody!

I'm trying to install the latest Redmine (2.2) on my CentOS 6 with running Apache Tomcat6 server.
Everything works fine (already tested with WEBrick - no problems till here).
Now I try to get the whole thing run on my tomcat-server. I followed this How-To: http://www.redmine.org/projects/redmine/wiki/HowTo_install_Redmine_in_Apache_Tomcat

But when I try to load my page I get the error:

org.jruby.exceptions.RaiseException: (GemNotFound) Could not find gem 'jruby-openssl (>= 0) java' in the gems available on this machine.
    at RUBY.resolve(/usr/share/tomcat6/webapps/redmine/WEB-INF/gems/gems/bundler-1.3.2/lib/bundler/resolver.rb:294)
    ...

So I tried to add "gem 'jruby-openssl'" to the Gemfile.
After the new bundle-setup and try to "warble":

Loading jruby-openssl in a non-JRuby interpreter
Loading jruby-openssl in a non-JRuby interpreter
warble aborted!
/usr/lib/ruby/gems/1.8/gems/jruby-openssl-0.8.4/lib/shared/jruby-openssl.rb:13:in `require': no such file to load -- jruby
/opt/redmine-2.2/config/application.rb:7
./Rakefile:5
(eval):5:in `new'
(eval):5:in `initialize'

The two lines in my warble.rb:

config.dirs = %w(app config lib log vendor tmp extra files)
config.gems += ["activerecord-jdbcmysql-adapter", "jruby-openssl", "i18n", "rack"]

Please help me.. I'm freaking out with this..
It worked so well while testing with WEBrick.. :/

Thanks in advance!