Rails Error

I'm totally new with ruby on rails My machine running ubuntu 8.10 and i have installed ruby 1.8.7, rubygems 1.3.1 and rails 2.3.2, sqlite3, postfix adn subversion. The problem is when i want to create a simple blog application this error came out. fadil@fadil-laptop:~$ sudo rails blog /var/lib/gems/1.9.0/gems/activesupport-2.3.2/lib/active_support/ core_ext/uri.rb:8:in `<top (required)>': uninitialized constant URI::Parser (NameError)   from /var/lib/gems/1.9.0/gems/activesupport-2.3.2/lib/active_support/ core_ext.rb:3:in `require'   from /var/lib/gems/1.9.0/gems/activesupport-2.3.2/lib/active_support/ core_ext.rb:3:in `block in <top (required)>'   from /var/lib/gems/1.9.0/gems/activesupport-2.3.2/lib/active_support/ core_ext.rb:1:in `each'   from /var/lib/gems/1.9.0/gems/activesupport-2.3.2/lib/active_support/ core_ext.rb:1:in `<top (required)>'   from /var/lib/gems/1.9.0/gems/activesupport-2.3.2/lib/ active_support.rb:55:in `require'   from /var/lib/gems/1.9.0/gems/activesupport-2.3.2/lib/ active_support.rb:55:in `<top (required)>'   from /var/lib/gems/1.9.0/gems/rails-2.3.2/lib/rails_generator.rb: 28:in `require'   from /var/lib/gems/1.9.0/gems/rails-2.3.2/lib/rails_generator.rb: 28:in `<top (required)>'   from /var/lib/gems/1.9.0/gems/rails-2.3.2/bin/rails:14:in `require'   from /var/lib/gems/1.9.0/gems/rails-2.3.2/bin/rails:14:in `<top (required)>'   from /usr/bin/rails:19:in `load'   from /usr/bin/rails:19:in `<main>' fadil@fadil-laptop:~$ Help me please. Regards. Fadil

I'm totally new with ruby on rails My machine running ubuntu 8.10 and i have installed ruby 1.8.7, rubygems 1.3.1 and rails 2.3.2, sqlite3, postfix adn subversion. The problem is when i want to create a simple blog application this error came out.

That stack trace looks you are using ruby 1.9.0 which you almost certainly don't want to use (1.9.0 was the development version of what was eventually released as ruby 1.9.1)

Fred