Redmine

Hi, I've a problem when I try to install Redmine on my Ubuntu.
I'm at step 4 of the Installation step of the official Redmine installation documentation page ([[http://www.redmine.org/projects/redmine/wiki/RedmineInstall]]). Rake wasn't installed so I did it using aptitude, and now when I'm try to execute this command:

rake generate_session_store

I get the following error message:

(in /var/www/redmine)
rake aborted!
no such file to load -- rubygems
/var/www/redmine/Rakefile:4:in `require'
(See full trace by running task with --trace)

When I execute the same command with the --trace option, I get the following:

(in /var/www/redmine)
rake aborted!
no such file to load -- rubygems
/var/www/redmine/config/boot.rb:113:in `require'
/var/www/redmine/config/boot.rb:113
/var/www/redmine/Rakefile:4:in `require'
/var/www/redmine/Rakefile:4
/usr/lib/ruby/1.8/rake.rb:2383:in `load'
/usr/lib/ruby/1.8/rake.rb:2383:in `raw_load_rakefile'
/usr/lib/ruby/1.8/rake.rb:2017:in `load_rakefile'
/usr/lib/ruby/1.8/rake.rb:2068:in `standard_exception_handling'
/usr/lib/ruby/1.8/rake.rb:2016:in `load_rakefile'
/usr/lib/ruby/1.8/rake.rb:2000:in `run'
/usr/lib/ruby/1.8/rake.rb:2068:in `standard_exception_handling'
/usr/lib/ruby/1.8/rake.rb:1998:in `run'
/usr/bin/rake:28

So I gone to the file boot.rb, which is located in the config directory of Redmine, and at the line 113 I found this:

require 'rubygems'

I think it try to include the file rubygems.rb (or I've mistaken something ?), and after a search in the Redmine directory and its sub-directories it appears that this file is effectively missing.

Can someone try to help me to solve this issue ?

Thanks in advance!