Trouble launching active_record

I'm having a hard time launching active_record from my ruby script. I get :

Unable to activate activemodel-3.0.9, because i18n-开发者_StackOverflow社区0.6.0 conflicts with i18n (~> 0.5.0) (Gem::LoadError)

I'm using RVM on ruby-1.9.2-p180

---

remove all versions of i18n. gem uninstall i18n

now write gem 'rails', '3.0.9' in your gemfile. Delete gemfile.lock

run bundle install