Rails - Jan 2006 - gem install login_generator

I am trying to install a gem into my Dreamhost account:
http://wiki.dreamhost.com/index.php/Ruby_on_Rails#Using_gems_installed_in_your_home_directory

But it doesn''t work. I don''t quite understand the error
message:

pico$ gem update --source http://gems.rubyonrails.com
Upgrading installed gems...
Updating Gem source index for: http://gems.rubyonrails.com
Gems: [] updated
pico$ gem install login_generator
Attempting local installation of ''login_generator''
Local gem file not found: login_generator*.gem
Attempting remote installation of ''login_generator''
/usr/local/lib/site_ruby/1.8/rubygems.rb:194:in
`report_activate_error'': Could not find RubyGem sources (> 0.0.0)
(Gem::LoadError)
        from /usr/local/lib/site_ruby/1.8/rubygems.rb:136:in `activate''
        from /usr/local/lib/site_ruby/1.8/rubygems.rb:37:in
`require_gem_with_options''
        from /usr/local/lib/site_ruby/1.8/rubygems.rb:31:in
`require_gem''
        from /usr/local/lib/site_ruby/1.8/rubygems/remote_installer.rb:403:in
`sources''
        from /usr/local/lib/site_ruby/1.8/rubygems/remote_installer.rb:413:in
`source_index_hash''
        from /usr/local/lib/site_ruby/1.8/rubygems/remote_installer.rb:377:in
`install''
        from /usr/local/lib/site_ruby/1.8/rubygems/gem_commands.rb:179:in
`execute''
        from /usr/local/lib/site_ruby/1.8/rubygems/gem_commands.rb:137:in
`each''
        from /usr/local/lib/site_ruby/1.8/rubygems/gem_commands.rb:137:in
`execute''
        from /usr/local/lib/site_ruby/1.8/rubygems/command.rb:49:in
`invoke''
        from /usr/local/lib/site_ruby/1.8/rubygems/cmd_manager.rb:92:in
`process_args''
        from /usr/local/lib/site_ruby/1.8/rubygems/cmd_manager.rb:65:in
`run''
        from /usr/local/lib/site_ruby/1.8/rubygems/gem_runner.rb:9:in
`run''
        from /usr/bin/gem:17