Redmine

Hello, I try to install redmine on debian.

I used this tutorial:
http://www.redmine.org/projects/redmine/wiki/HowTo_Install_Redmine_using_Debian_package

The problem is when i try to open my redmine page:
Error message: No such file or directory - /etc/redmine/default/session.yml

I read that i have to generate some token. So I tried :)

root:/usr/share/redmine# rake generate_secret_token

Unfortunately, it doesn't work :(

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/vendor/rails/railties/lib/rails/gem_dependency.rb:21.
rake aborted!
/usr/lib/ruby/vendor_ruby/active_support/vendor.rb:10: invalid multibyte char (US-ASCII)
/usr/lib/ruby/vendor_ruby/active_support/vendor.rb:10: syntax error, unexpected $end
ź def self.normalize_translation_keys(*args)
^

(See full trace by running task with --trace)