no such file load errors - md5

Dear All ,

I have a problem with : this error messasge " No Such File Load error - md5 "

I can only use with development section.(rails s) I can't use with production . ( rails s -e production). I use this command, the error message is like this

Exiting /opt/local/lib/ruby1.9/gems/1.9.1/gems/activesupport-3.2.2/lib/active_support/dependencies.rb:317:in `rescue in depend_on': No such file to load -- MD5 (LoadError)   from /opt/local/lib/ruby1.9/gems/1.9.1/gems/activesupport-3.2.2/lib/active_support/dependencies.rb:312:in `depend_on'   from /opt/local/lib/ruby1.9/gems/1.9.1/gems/activesupport-3.2.2/lib/active_support/dependencies.rb:225:in `require_dependency'   from /opt/local/lib/ruby1.9/gems/1.9.1/gems/railties-3.2.2/lib/rails/engine.rb:439:in `block (2 levels) in eager_load!'   from /opt/local/lib/ruby1.9/gems/1.9.1/gems/railties-3.2.2/lib/rails/engine.rb:438:in `each'   from /opt/local/lib/ruby1.9/gems/1.9.1/gems/railties-3.2.2/lib/rails/engine.rb:438:in `block in eager_load!'   from /opt/local/lib/ruby1.9/gems/1.9.1/gems/railties-3.2.2/lib/rails/engine.rb:436:in `each'   from /opt/local/lib/ruby1.9/gems/1.9.1/gems/railties-3.2.2/lib/rails/engine.rb:436:in `eager_load!'   from /opt/local/lib/ruby1.9/gems/1.9.1/gems/railties-3.2.2/lib/rails/application/finisher.rb:53:in `block in <module:Finisher>'   from /opt/local/lib/ruby1.9/gems/1.9.1/gems/railties-3.2.2/lib/rails/initializable.rb:30:in `instance_exec'   from /opt/local/lib/ruby1.9/gems/1.9.1/gems/railties-3.2.2/lib/rails/initializable.rb:30:in `run'   from /opt/local/lib/ruby1.9/gems/1.9.1/gems/railties-3.2.2/lib/rails/initializable.rb:55:in `block in run_initializers'   from /opt/local/lib/ruby1.9/gems/1.9.1/gems/railties-3.2.2/lib/rails/initializable.rb:54:in `each'   from /opt/local/lib/ruby1.9/gems/1.9.1/gems/railties-3.2.2/lib/rails/initializable.rb:54:in `run_initializers'   from /opt/local/lib/ruby1.9/gems/1.9.1/gems/railties-3.2.2/lib/rails/application.rb:136:in `initialize!'   from /opt/local/lib/ruby1.9/gems/1.9.1/gems/railties-3.2.2/lib/rails/railtie/configurable.rb:30:in `method_missing'   from /Users/workstation02/sportskaki/config/environment.rb:5:in `<top (required)>'   from /Users/workstation02/sportskaki/config.ru:4:in `require'   from /Users/workstation02/sportskaki/config.ru:4:in `block in <main>'   from /opt/local/lib/ruby1.9/gems/1.9.1/gems/rack-1.4.1/lib/rack/builder.rb:51:in `instance_eval'   from /opt/local/lib/ruby1.9/gems/1.9.1/gems/rack-1.4.1/lib/rack/builder.rb:51:in `initialize'   from /Users/workstation02/sportskaki/config.ru:1:in `new'

....................x................

to encrypt password using with require 'md5' , require digest/md5 , in my controller , I declare head of my controller

require digest/md5 Class Manage::AdminusersController < ApplicationController def index      @adminusers = Adminuser.all end end .......................

And I run rails s -e production , I see no such file to load md5. I remove require digest/md5 , I see this error also.

In my project I use rails 3.2.2 and ruby 1.9.3p125 (2012-02-16 revision 34643) [x86_64-darwin11]

Pls help me, all

Sincerely

phoesan