Q:

Cannot load gem in IronRuby

I already removed all environment variables and ruby/ironruby directories and reinstalled it from scratch. And then I installed mocha through igem. Here are my outputs.
$ ir
IronRuby 0.9.1.0 on .NET 2.0.50727.3082
Copyright (c) Microsoft Corporation. All rights reserved.

>>> require 'mocha'
:0:in `require': no such file to load -- mocha (LoadError)
        from :0

Listing my installed gems. . .
$ igem list --local

*** LOCAL GEMS ***

mocha (0.9.8)
rake (0.8.7)

This is my gem environment.
$ igem environment
RubyGems Environment:
  - RUBYGEMS VERSION: 1.3.5
  - RUBY VERSION: 1.8.6 (2008-05-28 patchlevel 0) [i386-mswin32]
  - INSTALLATION DIRECTORY: C:/ironruby/lib/IronRuby/../..//lib/ironruby/gems/1.8
  - RUBY EXECUTABLE: C:/ironruby/lib/IronRuby/../..//bin/ir.exe
  - EXECUTABLE DIRECTORY: C:/ironruby/lib/IronRuby/../..//bin
  - RUBYGEMS PLATFORMS:
    - ruby
    - x86-mswin32-60
  - GEM PATHS:
     - C:/ironruby/lib/IronRuby/../..//lib/ironruby/gems/1.8
     - C:/Documents and Settings/vitalim/.gem/ironruby/1.8
  - GEM CONFIGURATION:
     - :update_sources => true
     - :verbose => true
     - :benchmark => false
     - :backtrace => false
     - :bulk_threshold => 1000
     - :sources => ["http://gems.rubyforge.org/", "http://gems.github.com"]
  - REMOTE SOURCES:
     - http://gems.rubyforge.org/
     - http://gems.github.com

Hope you can hep me with this :(

A:

require 'rubygems' then require 'mocha' should work in this case. Require'ing rubygems sets up require to be able to find your gems.

