rake command shows the error

rails -v=2.3.8 gem -v= 1.4.2 ruby -v=1.8.7

When i issue the "rake" command ,it gives the following error .

(in /home/amrit/amrit/OSV/OpenStreetView) /usr/bin/ruby1.8 -I"lib:test" "/usr/lib/ruby/gems/1.8/gems/rake-0.8.7/lib/rake/rake_test_loader.rb" "test/functional/main_controller_test.rb" "test/functional/upload_controller_test.rb" "test/functional/moderate_controller_test.rb" "test/functional/content_controller_test.rb" "test/functional/homepage_controller_test.rb" "test/functional/users_controller_test.rb" "test/functional/private_controller_test.rb" "test/functional/sessions_controller_test.rb" "test/functional/api/photo_controller_test.rb" "test/functional/api/application_controller_test.rb" "test/functional/api/photos_controller_test.rb" /usr/lib/ruby/gems/1.8/gems/activesupport-2.3.8/lib/active_support/dependencies.rb:105:in `const_missing': uninitialized constant User::Authentication (NameError)   from /home/amrit/amrit/OSV/OpenStreetView/app/models/user.rb:4   from /usr/local/lib/site_ruby/1.8/rubygems/custom_require.rb:29:in `gem_original_require'   from /usr/local/lib/site_ruby/1.8/rubygems/custom_require.rb:29:in `require'   from /usr/lib/ruby/gems/1.8/gems/activesupport-2.3.8/lib/active_support/dependencies.rb:158:in `require'   from /usr/lib/ruby/gems/1.8/gems/activesupport-2.3.8/lib/active_support/dependencies.rb:265:in `require_or_load'   from /usr/lib/ruby/gems/1.8/gems/activesupport-2.3.8/lib/active_support/dependencies.rb:425:in `load_missing_constant'   from /usr/lib/ruby/gems/1.8/gems/activesupport-2.3.8/lib/active_support/dependencies.rb:80:in `const_missing'   from /usr/lib/ruby/gems/1.8/gems/activesupport-2.3.8/lib/active_support/dependencies.rb:92:in `const_missing'   from /usr/lib/ruby/gems/1.8/gems/activesupport-2.3.8/lib/active_support/inflector.rb:364:in `constantize'   from /usr/lib/ruby/gems/1.8/gems/activesupport-2.3.8/lib/active_support/inflector.rb:363:in `each'   from /usr/lib/ruby/gems/1.8/gems/activesupport-2.3.8/lib/active_support/inflector.rb:363:in `constantize'   from /usr/lib/ruby/gems/1.8/gems/activesupport-2.3.8/lib/active_support/core_ext/string/inflections.rb:162:in `constantize'   from /usr/lib/ruby/gems/1.8/gems/activerecord-2.3.8/lib/active_record/observer.rb:157:in `observed_class'   from /usr/lib/ruby/gems/1.8/gems/activerecord-2.3.8/lib/active_record/observer.rb:183:in `observed_classes'   from /usr/lib/ruby/gems/1.8/gems/activerecord-2.3.8/lib/active_record/observer.rb:166:in `initialize'   from /usr/lib/ruby/1.8/singleton.rb:94:in `new'   from /usr/lib/ruby/1.8/singleton.rb:94:in `instance'   from /usr/lib/ruby/gems/1.8/gems/activerecord-2.3.8/lib/active_record/observer.rb:38:in `instantiate_observers'   from /usr/lib/ruby/gems/1.8/gems/activerecord-2.3.8/lib/active_record/observer.rb:36:in `each'   from /usr/lib/ruby/gems/1.8/gems/activerecord-2.3.8/lib/active_record/observer.rb:36:in `instantiate_observers'   from /usr/lib/ruby/gems/1.8/gems/actionpack-2.3.8/lib/action_controller/dispatcher.rb:15   from /usr/lib/ruby/gems/1.8/gems/activesupport-2.3.8/lib/active_support/callbacks.rb:182:in `call'   from /usr/lib/ruby/gems/1.8/gems/activesupport-2.3.8/lib/active_support/callbacks.rb:182:in `evaluate_method'   from /usr/lib/ruby/gems/1.8/gems/activesupport-2.3.8/lib/active_support/callbacks.rb:166:in `call'   from /usr/lib/ruby/gems/1.8/gems/activesupport-2.3.8/lib/active_support/callbacks.rb:90:in `run'   from /usr/lib/ruby/gems/1.8/gems/activesupport-2.3.8/lib/active_support/callbacks.rb:90:in `each'   from /usr/lib/ruby/gems/1.8/gems/activesupport-2.3.8/lib/active_support/callbacks.rb:90:in `send'   from /usr/lib/ruby/gems/1.8/gems/activesupport-2.3.8/lib/active_support/callbacks.rb:90:in `run'   from /usr/lib/ruby/gems/1.8/gems/activesupport-2.3.8/lib/active_support/callbacks.rb:276:in `run_callbacks'   from /usr/lib/ruby/gems/1.8/gems/actionpack-2.3.8/lib/action_controller/dispatcher.rb:51:in `send'   from /usr/lib/ruby/gems/1.8/gems/actionpack-2.3.8/lib/action_controller/dispatcher.rb:51:in `run_prepare_callbacks'   from /usr/lib/ruby/gems/1.8/gems/rails-2.3.8/lib/initializer.rb:631:in `prepare_dispatcher'   from /usr/lib/ruby/gems/1.8/gems/rails-2.3.8/lib/initializer.rb:185:in `process'   from /usr/lib/ruby/gems/1.8/gems/rails-2.3.8/lib/initializer.rb:113:in `send'   from /usr/lib/ruby/gems/1.8/gems/rails-2.3.8/lib/initializer.rb:113:in `run'   from /home/amrit/amrit/OSV/OpenStreetView/config/environment.rb:12   from ./test/test_helper.rb:2:in `require'   from ./test/test_helper.rb:2   from ./test/functional/main_controller_test.rb:1:in `require'   from ./test/functional/main_controller_test.rb:1   from /usr/lib/ruby/gems/1.8/gems/rake-0.8.7/lib/rake/rake_test_loader.rb:5:in `load'   from /usr/lib/ruby/gems/1.8/gems/rake-0.8.7/lib/rake/rake_test_loader.rb:5   from /usr/lib/ruby/gems/1.8/gems/rake-0.8.7/lib/rake/rake_test_loader.rb:5:in `each'   from /usr/lib/ruby/gems/1.8/gems/rake-0.8.7/lib/rake/rake_test_loader.rb:5 /usr/bin/ruby1.8 -I"lib:test" "/usr/lib/ruby/gems/1.8/gems/rake-0.8.7/lib/rake/rake_test_loader.rb" Errors running test:units and test:functionals!

Please see where is the error?

What is on that line (show us from the start of user.rb)?

Colin