Redmine

Hi, I hope you can help me.

I am a really redmine noob.
I accidentally overwritten the configuration.yml file.Now I always get the following error message:

Your config/database.yml may not be written correctly. Please check it and fix any errors.
Your database schema may be out of date or nonexistant. Please run rake db:migrate to ensure that the database schema is up-to-date.
The database server may not be running. Please check whether it's running, and start it if it isn't.

So I copied the configuration.yml.example, but the error remains. I hope you can help me.

At this time my configuration.yml looks like this :

production:
    email_delivery:
      delivery_method: :smtp

smtp_settings:
        address: xxx.xxx.com
        port: 25
        domain: xxx.xxx.com
        authentication: :login
        user_name: "xxxxxxxx-redmine" 
        password: "xxxxxxxx"

attachments_storage_path:/usr/local/lib/redmine-1.3/files

autologin_cookie_name:autologin
  autologin_cookie_path:/
  autologin_cookie_secure:false

scm_subversion_command:   svn --config-dir /var/www/rails/redmine/svn
  scm_mercurial_command:    C:\Program Files\TortoiseHg\hg.exe
  scm_git_command:          /usr/local/bin/git

scm_cvs_command:          cvs

scm_bazaar_command:       bzr.exe
  scm_darcs_command:        darcs-1.0.9-i386-linux

database_cipher_key:

Thanks!