Я не могу запустить гем db2s3 в моем приложении rails 3.
/usr/lib/ruby/gems/1.8/gems/db2s3-0.3.1/lib/db2s3.rb:1:in `require': no such file to load -- activesupport (LoadError)
from /usr/lib/ruby/gems/1.8/gems/db2s3-0.3.1/lib/db2s3.rb:1
from /usr/lib/ruby/gems/1.8/gems/bundler-1.0.0/lib/bundler/runtime.rb:64:in `require'
from /usr/lib/ruby/gems/1.8/gems/bundler-1.0.0/lib/bundler/runtime.rb:64:in `require'
from /usr/lib/ruby/gems/1.8/gems/bundler-1.0.0/lib/bundler/runtime.rb:62:in `each'
from /usr/lib/ruby/gems/1.8/gems/bundler-1.0.0/lib/bundler/runtime.rb:62:in `require'
from /usr/lib/ruby/gems/1.8/gems/bundler-1.0.0/lib/bundler/runtime.rb:51:in `each'
from /usr/lib/ruby/gems/1.8/gems/bundler-1.0.0/lib/bundler/runtime.rb:51:in `require'
from /usr/lib/ruby/gems/1.8/gems/bundler-1.0.0/lib/bundler.rb:112:in `require'
from /home/sean/chief/config/application.rb:7
from /usr/lib/ruby/gems/1.8/gems/railties-3.0.0/lib/rails/commands.rb:28:in `require'
from /usr/lib/ruby/gems/1.8/gems/railties-3.0.0/lib/rails/commands.rb:28
from /usr/lib/ruby/gems/1.8/gems/railties-3.0.0/lib/rails/commands.rb:27:in `tap'
from /usr/lib/ruby/gems/1.8/gems/railties-3.0.0/lib/rails/commands.rb:27
from script/rails:6:in `require'
from script/rails:6