我已将rails项目克隆到我的本地计算机中。然后我使用bundle install命令安装了所有需要的宝石。但是当我尝试启动服务器时，我收到错误：
`polyglot_original_require': no such file to load -- eventmachine (MissingSourceFile)
当我运行gem list时，我可以找到eventmachine个宝石。那有什么不对？
这是完整的堆栈跟踪：
/.rvm/gems/ruby-1.8.7-p371/gems/polyglot-0.3.3/lib/polyglot.rb:63:in `polyglot_original_require': no such file to load -- eventmachine (MissingSourceFile)
from /home/oleksandr/.rvm/gems/ruby-1.8.7-p371/gems/polyglot-0.3.3/lib/polyglot.rb:63:in `require'
from /home/oleksandr/dev/salamstein/vendor/rails/activesupport/lib/active_support/dependencies.rb:182:in `require'
from /home/oleksandr/dev/salamstein/vendor/rails/activesupport/lib/active_support/dependencies.rb:547:in `new_constants_in'
from /home/oleksandr/dev/salamstein/vendor/rails/activesupport/lib/active_support/dependencies.rb:182:in `require'
from /home/oleksandr/.rvm/gems/ruby-1.8.7-p371/gems/thin-2.0.0.pre/lib/thin/server.rb:1
from /home/oleksandr/.rvm/gems/ruby-1.8.7-p371/gems/polyglot-0.3.3/lib/polyglot.rb:63:in `polyglot_original_require'
from /home/oleksandr/.rvm/gems/ruby-1.8.7-p371/gems/polyglot-0.3.3/lib/polyglot.rb:63:in `require'
from /home/oleksandr/dev/salamstein/vendor/rails/activesupport/lib/active_support/dependencies.rb:182:in `require'
from /home/oleksandr/dev/salamstein/vendor/rails/activesupport/lib/active_support/dependencies.rb:547:in `new_constants_in'
from /home/oleksandr/dev/salamstein/vendor/rails/activesupport/lib/active_support/dependencies.rb:182:in `require'
from /home/oleksandr/.rvm/gems/ruby-1.8.7-p371/gems/thin-2.0.0.pre/lib/thin.rb:3
from /home/oleksandr/.rvm/gems/ruby-1.8.7-p371@global/gems/bundler-1.3.5/lib/bundler/runtime.rb:72:in `require'
from /home/oleksandr/.rvm/gems/ruby-1.8.7-p371@global/gems/bundler-1.3.5/lib/bundler/runtime.rb:72:in `require'
from /home/oleksandr/.rvm/gems/ruby-1.8.7-p371@global/gems/bundler-1.3.5/lib/bundler/runtime.rb:70:in `each'
from /home/oleksandr/.rvm/gems/ruby-1.8.7-p371@global/gems/bundler-1.3.5/lib/bundler/runtime.rb:70:in `require'
from /home/oleksandr/.rvm/gems/ruby-1.8.7-p371@global/gems/bundler-1.3.5/lib/bundler/runtime.rb:59:in `each'
from /home/oleksandr/.rvm/gems/ruby-1.8.7-p371@global/gems/bundler-1.3.5/lib/bundler/runtime.rb:59:in `require'
from /home/oleksandr/.rvm/gems/ruby-1.8.7-p371@global/gems/bundler-1.3.5/lib/bundler.rb:132:in `require'
from /home/oleksandr/dev/salamstein/config/boot.rb:122:in `load_gems'
from /home/oleksandr/dev/salamstein/config/../vendor/rails/railties/lib/initializer.rb:164:in `process'
from /home/oleksandr/dev/salamstein/config/../vendor/rails/railties/lib/initializer.rb:113:in `send'
from /home/oleksandr/dev/salamstein/config/../vendor/rails/railties/lib/initializer.rb:113:in `run'
from /home/oleksandr/dev/salamstein/config/environment.rb:45
from /home/oleksandr/dev/salamstein/vendor/rails/activesupport/lib/active_support/dependencies.rb:182:in `require'
from /home/oleksandr/dev/salamstein/vendor/rails/activesupport/lib/active_support/dependencies.rb:182:in `require'
from /home/oleksandr/dev/salamstein/vendor/rails/activesupport/lib/active_support/dependencies.rb:547:in `new_constants_in'
from /home/oleksandr/dev/salamstein/vendor/rails/activesupport/lib/active_support/dependencies.rb:182:in `require'
from /home/oleksandr/dev/salamstein/vendor/rails/railties/lib/commands/server.rb:84
from script/server:3:in `require'
from script/server:3
谢谢。