Redmine

Hello,

I used redmine 0.5.1 and actually try to update it to 0.7
My OS is Debian Etch and Ruby is the last version available on it with apt-get (1.8.5)

I downloaded the latest version of redmine using this command :

cd /
 svn co svn://rubyforge.org/var/svn/redmine/branches/0.7-stable technique

Then I made a copy of my database configuration file :

cd /technique
 cp /redmine-0.5.1/config/database.yml .

I also the informations about SMTP in : /technique/config/environement.rb

Now if I'm right I must use the command from the new redmine directory :

rake db:migrate RAILS_ENV="production" --trace

..but I obtain this message :

(in /technique)
 rake aborted!
 no such file to load -- rubygems
 /technique/config/boot.rb:15:in `require'
 /technique/config/boot.rb:15
 /technique/Rakefile:4:in `require'
 /technique/Rakefile:4
 /usr/lib/ruby/1.8/rake.rb:1828:in `load'
 /usr/lib/ruby/1.8/rake.rb:1828:in `load_rakefile'
 /usr/lib/ruby/1.8/rake.rb:1900:in `run'
 /usr/bin/rake:4

If I try the same command from /redmine-0.5.1 directory It seam to works :

(in /redmine-0.5.1)
 Invoke db:migrate (first_time)
 Invoke environment (first_time)
 Execute environment
 Execute db:migrate
 Invoke db:schema:dump (first_time)
 Invoke environment
 Execute db:schema:dump

This is how looks my /technique/config/database.yml :

production:
  adapter: mysql
  socket: /var/run/mysqld/mysqld.sock
  database: redmine
  host: localhost
  username: root
  password:

I'm searching informations on google but found nothing that helped me.
Is someone could help me ?

thank you.