Ruby on Rails framework could not be loaded

Ruby on Rails framework version 2.0.2 seems to be corrupted. Please reinstall it. This can be done with the following command:
/opt/ruby-enterprise/bin/gem install rails --version 2.0.2
Framework that failed to load:
Rails framework version 2.0.2
Error message:
RubyGem version error: rails(2.1.2 not = 2.0.2)
Exception class:
Gem::LoadError
Backtrace:
# File Line Location
0 /opt/ruby-enterprise/lib/ruby/site_ruby/1.8/rubygems.rb 578 in `report_activate_error'
1 /opt/ruby-enterprise/lib/ruby/site_ruby/1.8/rubygems.rb 134 in `activate'
2 /opt/ruby-enterprise/lib/ruby/site_ruby/1.8/rubygems.rb 49 in `gem'
3 /usr/lib/ruby/gems/1.8/gems/passenger-2.0.3/lib/passenger/railz/framework_spawner.rb 229 in `preload_rails'
4 /usr/lib/ruby/gems/1.8/gems/passenger-2.0.3/lib/passenger/railz/framework_spawner.rb 205 in `initialize_server'
5 /usr/lib/ruby/gems/1.8/gems/passenger-2.0.3/lib/passenger/abstract_server.rb 166 in `start_synchronously'
6 /usr/lib/ruby/gems/1.8/gems/passenger-2.0.3/lib/passenger/abstract_server.rb 135 in `start'
7 /usr/lib/ruby/gems/1.8/gems/passenger-2.0.3/lib/passenger/abstract_server.rb 112 in `fork'
8 /usr/lib/ruby/gems/1.8/gems/passenger-2.0.3/lib/passenger/abstract_server.rb 112 in `start'
9 /usr/lib/ruby/gems/1.8/gems/passenger-2.0.3/lib/passenger/railz/framework_spawner.rb 87 in `start'
10 /usr/lib/ruby/gems/1.8/gems/passenger-2.0.3/lib/passenger/spawn_manager.rb 218 in `spawn_rails_application'
11 /usr/lib/ruby/gems/1.8/gems/passenger-2.0.3/lib/passenger/spawn_manager.rb 213 in `synchronize'
12 /usr/lib/ruby/gems/1.8/gems/passenger-2.0.3/lib/passenger/spawn_manager.rb 213 in `spawn_rails_application'
13 /usr/lib/ruby/gems/1.8/gems/passenger-2.0.3/lib/passenger/spawn_manager.rb 122 in `spawn_application'
14 /usr/lib/ruby/gems/1.8/gems/passenger-2.0.3/lib/passenger/spawn_manager.rb 247 in `handle_spawn_application'
15 /usr/lib/ruby/gems/1.8/gems/passenger-2.0.3/lib/passenger/abstract_server.rb 317 in `__send__'
16 /usr/lib/ruby/gems/1.8/gems/passenger-2.0.3/lib/passenger/abstract_server.rb 317 in `main_loop'
17 /usr/lib/ruby/gems/1.8/gems/passenger-2.0.3/lib/passenger/abstract_server.rb 168 in `start_synchronously'
18 /usr/lib/ruby/gems/1.8/gems/passenger-2.0.3/bin/passenger-spawn-server 46