Redmine

Hi, I try to install Redmine v 2.5 from zip archive on Ubuntu 12.04 LTS but I stuck in some point and gave it up. Than I found that I can install redmine from ubuntu repositories...so I did that. Now I have problems

1. redmine stop working after some time (500 server internal error on apache) apache2 restart helps
2. I cannot configure settings.

RAILS_ENV=production script/about

NOTE: Gem.source_index is deprecated, use Specification. It will be removed on or after 2011-11-01.
Gem.source_index called from /usr/share/redmine/config/../vendor/rails/railties/lib/rails/gem_dependency.rb:21.
NOTE: Gem::SourceIndex#initialize is deprecated with no replacement. It will be removed on or after 2011-11-01.
Gem::SourceIndex#initialize called from /usr/share/redmine/config/../vendor/rails/railties/lib/rails/vendor_gem_source_index.rb:100.
NOTE: Gem::SourceIndex#add_spec is deprecated, use Specification.add_spec. It will be removed on or after 2011-11-01.
Gem::SourceIndex#add_spec called from /usr/lib/ruby/vendor_ruby/1.8/rubygems/source_index.rb:91.
NOTE: Gem::SourceIndex#add_spec is deprecated, use Specification.add_spec. It will be removed on or after 2011-11-01.
Gem::SourceIndex#add_spec called from /usr/lib/ruby/vendor_ruby/1.8/rubygems/source_index.rb:91.
NOTE: Gem::SourceIndex#add_spec is deprecated, use Specification.add_spec. It will be removed on or after 2011-11-01.
Gem::SourceIndex#add_spec called from /usr/lib/ruby/vendor_ruby/1.8/rubygems/source_index.rb:91.
NOTE: Gem::SourceIndex#add_spec is deprecated, use Specification.add_spec. It will be removed on or after 2011-11-01.
Gem::SourceIndex#add_spec called from /usr/lib/ruby/vendor_ruby/1.8/rubygems/source_index.rb:91.
NOTE: Gem::SourceIndex#add_spec is deprecated, use Specification.add_spec. It will be removed on or after 2011-11-01.
Gem::SourceIndex#add_spec called from /usr/lib/ruby/vendor_ruby/1.8/rubygems/source_index.rb:91.
NOTE: Gem::SourceIndex#add_spec is deprecated, use Specification.add_spec. It will be removed on or after 2011-11-01.
Gem::SourceIndex#add_spec called from /usr/lib/ruby/vendor_ruby/1.8/rubygems/source_index.rb:91.
NOTE: Gem::SourceIndex#add_spec is deprecated, use Specification.add_spec. It will be removed on or after 2011-11-01.
Gem::SourceIndex#add_spec called from /usr/lib/ruby/vendor_ruby/1.8/rubygems/source_index.rb:91.
NOTE: Gem.source_index is deprecated, use Specification. It will be removed on or after 2011-11-01.
Gem.source_index called from /usr/share/redmine/config/../vendor/rails/railties/lib/rails/gem_dependency.rb:78.
NOTE: Gem::SourceIndex#each is deprecated with no replacement. It will be removed on or after 2011-11-01.
Gem::SourceIndex#each called from /usr/share/redmine/config/../vendor/rails/railties/lib/rails/vendor_gem_source_index.rb:123.
NOTE: Gem::Specification#installation_path is deprecated, use base_dir. It will be removed on or after 2011-10-01.
Gem::Specification#installation_path called from /usr/share/redmine/config/../vendor/rails/railties/lib/rails/vendor_gem_source_index.rb:93.
NOTE: Gem::Specification#installation_path is deprecated, use base_dir. It will be removed on or after 2011-10-01.
Gem::Specification#installation_path called from /usr/share/redmine/config/../vendor/rails/railties/lib/rails/vendor_gem_source_index.rb:93.
NOTE: Gem::Specification#installation_path is deprecated, use base_dir. It will be removed on or after 2011-10-01.
Gem::Specification#installation_path called from /usr/share/redmine/config/../vendor/rails/railties/lib/rails/vendor_gem_source_index.rb:93.
About your application's environment
Ruby version              1.8.7 (i686-linux)
RubyGems version          1.8.15
Rack version              1.3
Rails version             2.3.14
Active Record version     2.3.14
Active Resource version   2.3.14
Action Mailer version     2.3.14
Active Support version    2.3.14
Edge Rails revision       unknown
Application root          /usr/share/redmine
Environment               production
Database adapter          mysql
Database schema version   20110902000000

If I put configuration.yml to /etc/redmine/default

# default configuration options for all environments
default:
  # Outgoing emails configuration (see examples above)
  email_delivery:
    delivery_method: :smtp
    smtp_settings:
      address: localhost
      port: 25
      domain: mydomain.ltd
      authentication: :login
      user_name: "user@mydomain.ltd" 
      password: "secret" 

  attachments_storage_path: /var/redmine/files
  autologin_cookie_name:
  autologin_cookie_path:
  autologin_cookie_secure:

  scm_subversion_command:
  scm_mercurial_command:
  scm_git_command:
  scm_cvs_command:
  scm_bazaar_command:
  scm_darcs_command:

  production:
  development:

Some more information

#rails -v
Rails 3.2.17

#ruby -v
ruby 1.8.7 (2011-06-30 patchlevel 352) [i686-linux]

#gem1.8 -v
1.8.15

#gem1.9.1 -v
1.8.11

Server version: Apache/2.2.22 (Ubuntu)

Apache2 virtualhost configuration

<VirtualHost *:80>
        ServerAdmin postmaster@mydomain.ltd
        ServerName redmine.mydomain.ltd
        ServerAlias *.redmine.mydomain.ltd alias1.mydomain.ltd *.alias1.mydomain.ltd

        DocumentRoot /var/www/mydomain.ltd/redmine/public
       <Directory />
                Options FollowSymLinks
                RailsBaseURI /
                PassengerResolveSymlinksinDocumentRoot on
                AllowOverride None
        </Directory>
        <Directory /var/www/>
                Options Indexes FollowSymLinks MultiViews
                AllowOverride All
                Order allow,deny
                allow from all
        </Directory>

        ScriptAlias /cgi-bin/ /usr/lib/cgi-bin/
        <Directory "/usr/lib/cgi-bin">
                AllowOverride All
                Options +ExecCGI -MultiViews +SymLinksIfOwnerMatch
                Order allow,deny
                Allow from all
        </Directory>

        <Directory /var/www/mydomain.ltd/redmine/public>
        RailsBaseURI /redmine
        PassengerAppRoot /usr/share/redmine
        PassengerResolveSymlinksInDocumentRoot on
        </Directory>
        ErrorLog ${APACHE_LOG_DIR}/redmine/error.log
        LogLevel error
</VirtualHost>

I try to use:
gem update bundler dont solve the problem

May I try?
gem pristine --all --no-extensions
gem update --system 1.6.2 (I'm afraid of this)

Can I somehow clean this mess? And what should I do to enable email sending?