erro 'require'

[ghost]

quando uso o comando rails server, tenho o seguinte problema:

/var/lib/gems/1.9.1/gems/activesupport-3.2.5/lib/active_support/dependencies.rb:251:in require': no such file to load -- brazilian_rails (LoadError) from /var/lib/gems/1.9.1/gems/activesupport-3.2.5/lib/active_support/dependencies.rb:251:inblock in require'
from /var/lib/gems/1.9.1/gems/activesupport-3.2.5/lib/active_support/dependencies.rb:236:in load_dependency' from /var/lib/gems/1.9.1/gems/activesupport-3.2.5/lib/active_support/dependencies.rb:251:inrequire'
from /home/nathana/blog/config/environment.rb:3:in <top (required)>' from /var/lib/gems/1.9.1/gems/activesupport-3.2.5/lib/active_support/dependencies.rb:251:inrequire'
from /var/lib/gems/1.9.1/gems/activesupport-3.2.5/lib/active_support/dependencies.rb:251:in block in require' from /var/lib/gems/1.9.1/gems/activesupport-3.2.5/lib/active_support/dependencies.rb:236:inload_dependency'
from /var/lib/gems/1.9.1/gems/activesupport-3.2.5/lib/active_support/dependencies.rb:251:in require' from /home/nathana/blog/config.ru:4:inblock in

'
from /var/lib/gems/1.9.1/gems/rack-1.4.1/lib/rack/builder.rb:51:in instance_eval' from /var/lib/gems/1.9.1/gems/rack-1.4.1/lib/rack/builder.rb:51:ininitialize'
from /home/nathana/blog/config.ru:1:in new' from /home/nathana/blog/config.ru:1:in'
from /var/lib/gems/1.9.1/gems/rack-1.4.1/lib/rack/builder.rb:40:in eval' from /var/lib/gems/1.9.1/gems/rack-1.4.1/lib/rack/builder.rb:40:inparse_file'
from /var/lib/gems/1.9.1/gems/rack-1.4.1/lib/rack/server.rb:200:in app' from /var/lib/gems/1.9.1/gems/railties-3.2.5/lib/rails/commands/server.rb:46:inapp'
from /var/lib/gems/1.9.1/gems/rack-1.4.1/lib/rack/server.rb:301:in wrapped_app' from /var/lib/gems/1.9.1/gems/rack-1.4.1/lib/rack/server.rb:252:instart'
from /var/lib/gems/1.9.1/gems/railties-3.2.5/lib/rails/commands/server.rb:70:in start' from /var/lib/gems/1.9.1/gems/railties-3.2.5/lib/rails/commands.rb:55:inblock in <top (required)>'
from /var/lib/gems/1.9.1/gems/railties-3.2.5/lib/rails/commands.rb:50:in tap' from /var/lib/gems/1.9.1/gems/railties-3.2.5/lib/rails/commands.rb:50:in<top (required)>'
from script/rails:6:in require' from script/rails:6:in'

[tinogomes]

A versão do Ruby 1.9.1 não é estável e sugiro testar com uma versão mais atualizada do Ruby, 1.9.3 se possível.