HI, i am working in Rails .. my gem list is
*** LOCAL GEMS *** abstract (1.0.0) actionmailer (3.0.4, 3.0.3, 2.3.11, 2.3.10, 2.3.8, 2.3.4, 2.3.2) action
This is happening because you installed RubyGems that is too new for your version of Rails. Either downgrade (and re-run update_rubygems) or upgrade Rails to 2.3.11.