Redmine

Please, I wanted to install the plugin and I have followed this http://www.redmine.org/wiki/redmine/Plugins but I do not know what happened and now when I want to open Redmine, I have this error, please reply, I do not know how continue.

Ruby on Rails application could not be started
A source file that the application requires, is missing.

*
      It is possible that you didn't upload your application files correctly. Please check whether all your application files are uploaded.
*
      A required library may not installed. Please install all libraries that this application requires.

Further information about the error may have been written to the application's log file. Please check it in order to analyse the problem.

Error message:
no such file to load -- application (MissingSourceFile)
Exception class:
PhusionPassenger::UnknownError
Application root:
/usr/local/lib/redmine-0.9
Backtrace: # File Line Location
0 /usr/lib/ruby/1.8/rubygems/custom_require.rb 31 in `gem_original_require'
1 /usr/lib/ruby/1.8/rubygems/custom_require.rb 31 in `require'
2 /var/lib/gems/1.8/gems/activesupport-2.3.5/lib/active_support/dependencies.rb 158 in `require'
3 /usr/local/lib/redmine-0.9/vendor/plugins/redmine_local_avatars/lib/users_avatar_patch.rb 1
4 /usr/lib/ruby/1.8/rubygems/custom_require.rb 31 in `gem_original_require'
5 /usr/lib/ruby/1.8/rubygems/custom_require.rb 31 in `require'
6 /var/lib/gems/1.8/gems/activesupport-2.3.5/lib/active_support/dependencies.rb 158 in `require'
7 /usr/local/lib/redmine-0.9/vendor/plugins/redmine_local_avatars/init.rb 3 in `evaluate_init_rb'
8 /var/lib/gems/1.8/gems/rails-2.3.5/lib/rails/plugin.rb 158 in `evaluate_init_rb'
9 /var/lib/gems/1.8/gems/activesupport-2.3.5/lib/active_support/core_ext/kernel/reporting.rb 11 in `silence_warnings'
10 /var/lib/gems/1.8/gems/rails-2.3.5/lib/rails/plugin.rb 154 in `evaluate_init_rb'
11 /var/lib/gems/1.8/gems/rails-2.3.5/lib/rails/plugin.rb 48 in `load'
12 /usr/local/lib/redmine-0.9/config/../vendor/plugins/engines/lib/engines/plugin.rb 44 in `load'
13 /var/lib/gems/1.8/gems/rails-2.3.5/lib/rails/plugin/loader.rb 38 in `load_plugins'
14 /var/lib/gems/1.8/gems/rails-2.3.5/lib/rails/plugin/loader.rb 37 in `each'
15 /var/lib/gems/1.8/gems/rails-2.3.5/lib/rails/plugin/loader.rb 37 in `load_plugins'
16 /var/lib/gems/1.8/gems/rails-2.3.5/lib/initializer.rb 369 in `load_plugins'
17 /var/lib/gems/1.8/gems/rails-2.3.5/lib/initializer.rb 165 in `process'
18 /var/lib/gems/1.8/gems/rails-2.3.5/lib/initializer.rb 113 in `send'
19 /var/lib/gems/1.8/gems/rails-2.3.5/lib/initializer.rb 113 in `run'
20 /usr/local/lib/redmine-0.9/config/environment.rb 20
21 /usr/lib/ruby/1.8/rubygems/custom_require.rb 31 in `gem_original_require'
22 /usr/lib/ruby/1.8/rubygems/custom_require.rb 31 in `require'
23 /usr/local/lib/passenger/passenger-2.2.9/lib/phusion_passenger/railz/application_spawner.rb 299 in `preload_application'
24 /usr/local/lib/passenger/passenger-2.2.9/lib/phusion_passenger/railz/application_spawner.rb 248 in `initialize_server'
25 /usr/local/lib/passenger/passenger-2.2.9/lib/phusion_passenger/utils.rb 255 in `report_app_init_status'
26 /usr/local/lib/passenger/passenger-2.2.9/lib/phusion_passenger/railz/application_spawner.rb 233 in `initialize_server'
27 /usr/local/lib/passenger/passenger-2.2.9/lib/phusion_passenger/abstract_server.rb 194 in `start_synchronously'
28 /usr/local/lib/passenger/passenger-2.2.9/lib/phusion_passenger/abstract_server.rb 163 in `start'
29 /usr/local/lib/passenger/passenger-2.2.9/lib/phusion_passenger/railz/application_spawner.rb 209 in `start'
30 /usr/local/lib/passenger/passenger-2.2.9/lib/phusion_passenger/spawn_manager.rb 262 in `spawn_rails_application'
31 /usr/local/lib/passenger/passenger-2.2.9/lib/phusion_passenger/abstract_server_collection.rb 126 in `lookup_or_add'
32 /usr/local/lib/passenger/passenger-2.2.9/lib/phusion_passenger/spawn_manager.rb 256 in `spawn_rails_application'
33 /usr/local/lib/passenger/passenger-2.2.9/lib/phusion_passenger/abstract_server_collection.rb 80 in `synchronize'
34 /usr/local/lib/passenger/passenger-2.2.9/lib/phusion_passenger/abstract_server_collection.rb 79 in `synchronize'
35 /usr/local/lib/passenger/passenger-2.2.9/lib/phusion_passenger/spawn_manager.rb 255 in `spawn_rails_application'
36 /usr/local/lib/passenger/passenger-2.2.9/lib/phusion_passenger/spawn_manager.rb 154 in `spawn_application'
37 /usr/local/lib/passenger/passenger-2.2.9/lib/phusion_passenger/spawn_manager.rb 287 in `handle_spawn_application'
38 /usr/local/lib/passenger/passenger-2.2.9/lib/phusion_passenger/abstract_server.rb 352 in `__send__'
39 /usr/local/lib/passenger/passenger-2.2.9/lib/phusion_passenger/abstract_server.rb 352 in `main_loop'
40 /usr/local/lib/passenger/passenger-2.2.9/lib/phusion_passenger/abstract_server.rb 196 in `start_synchronously'
41 /usr/local/lib/passenger/passenger-2.2.9/bin/passenger-spawn-server 61