Ruby on Rails application could not be started

These are the possible causes:
  • There may be a syntax error in the application's code. Please check for such errors and fix them.
  • A required library may not installed. Please install all libraries that this application requires.
  • The application may not be properly configured. Please check whether all configuration files are written correctly, fix any incorrect configurations, and restart this application.
  • A service that the application relies on (such as the database server or the Ferret search engine server) may not have been started. Please start that service.
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:
private method `specification_version=' called for #<Gem::Specification:0xb7b45a34>
Exception class:
NoMethodError
Application root:
/home/bras1500/1500brasil.com/releases/20080128235501
Backtrace:
# File Line Location
0 /usr/lib/ruby/site_ruby/1.8/rubygems/source_index.rb 86 in `load_specification'
1 /usr/lib/ruby/site_ruby/1.8/rubygems/specification.rb 401 in `initialize'
2 (eval) 1 in `new'
3 (eval) 1 in `load_specification'
4 /usr/lib/ruby/site_ruby/1.8/rubygems/source_index.rb 121 in `eval'
5 /usr/lib/ruby/site_ruby/1.8/rubygems/source_index.rb 86 in `load_specification'
6 /usr/lib/ruby/site_ruby/1.8/rubygems/source_index.rb 121 in `load_gems_in'
7 /usr/lib/ruby/site_ruby/1.8/rubygems/source_index.rb 120 in `each'
8 /usr/lib/ruby/site_ruby/1.8/rubygems/source_index.rb 120 in `load_gems_in'
9 /usr/lib/ruby/site_ruby/1.8/rubygems/source_index.rb 75 in `from_gems_in'
10 /usr/lib/ruby/site_ruby/1.8/rubygems/source_index.rb 47 in `from_installed_gems'
11 /usr/lib/ruby/site_ruby/1.8/rubygems.rb 109 in `source_index'
12 /usr/lib/ruby/site_ruby/1.8/rubygems/custom_require.rb 111 in `init_gemspecs'
13 /usr/lib/ruby/site_ruby/1.8/rubygems/custom_require.rb 56 in `initialize'
14 /usr/lib/ruby/site_ruby/1.8/rubygems/custom_require.rb 30 in `new'
15 /usr/lib/ruby/site_ruby/1.8/rubygems/custom_require.rb 30 in `require'
16 /home/bras1500/1500brasil.com/releases/20080128235501/vendor/rails/activerecord/lib/../../activesupport/lib/active_support/dependencies.rb 364 in `require'
17 /home/bras1500/1500brasil.com/releases/20080128235501/vendor/rails/activerecord/lib/active_record/connection_adapters/db2_adapter.rb 6
18 /usr/lib/ruby/site_ruby/1.8/rubygems/custom_require.rb 27 in `gem_original_require'
19 /usr/lib/ruby/site_ruby/1.8/rubygems/custom_require.rb 27 in `require'
20 /home/bras1500/1500brasil.com/releases/20080128235501/vendor/rails/activerecord/lib/../../activesupport/lib/active_support/dependencies.rb 364 in `require'
21 /home/bras1500/1500brasil.com/releases/20080128235501/vendor/rails/activerecord/lib/active_record.rb 81
22 /home/bras1500/1500brasil.com/releases/20080128235501/vendor/rails/activerecord/lib/active_record.rb 80 in `each'
23 /home/bras1500/1500brasil.com/releases/20080128235501/vendor/rails/activerecord/lib/active_record.rb 80
24 /usr/lib/ruby/site_ruby/1.8/rubygems/custom_require.rb 27 in `gem_original_require'
25 /usr/lib/ruby/site_ruby/1.8/rubygems/custom_require.rb 27 in `require'
26 /home/bras1500/1500brasil.com/releases/20080128235501/vendor/rails/railties/lib/initializer.rb 160 in `require_frameworks'
27 /home/bras1500/1500brasil.com/releases/20080128235501/vendor/rails/railties/lib/initializer.rb 160 in `each'
28 /home/bras1500/1500brasil.com/releases/20080128235501/vendor/rails/railties/lib/initializer.rb 160 in `require_frameworks'
29 /home/bras1500/1500brasil.com/releases/20080128235501/vendor/rails/railties/lib/initializer.rb 82 in `process'
30 /home/bras1500/1500brasil.com/releases/20080128235501/vendor/rails/railties/lib/initializer.rb 42 in `send'
31 /home/bras1500/1500brasil.com/releases/20080128235501/vendor/rails/railties/lib/initializer.rb 42 in `run'
32 ./config/environment.rb 13
33 /usr/lib/ruby/site_ruby/1.8/rubygems/custom_require.rb 27 in `gem_original_require'
34 /usr/lib/ruby/site_ruby/1.8/rubygems/custom_require.rb 27 in `require'
35 /usr/lib/ruby/gems/1.8/gems/passenger-2.0.3/lib/passenger/railz/application_spawner.rb 252 in `preload_application'
36 /usr/lib/ruby/gems/1.8/gems/passenger-2.0.3/lib/passenger/railz/application_spawner.rb 212 in `initialize_server'
37 /usr/lib/ruby/gems/1.8/gems/passenger-2.0.3/lib/passenger/utils.rb 181 in `report_app_init_status'
38 /usr/lib/ruby/gems/1.8/gems/passenger-2.0.3/lib/passenger/railz/application_spawner.rb 201 in `initialize_server'
39 /usr/lib/ruby/gems/1.8/gems/passenger-2.0.3/lib/passenger/abstract_server.rb 166 in `start_synchronously'
40 /usr/lib/ruby/gems/1.8/gems/passenger-2.0.3/lib/passenger/abstract_server.rb 135 in `start'
41 /usr/lib/ruby/gems/1.8/gems/passenger-2.0.3/lib/passenger/abstract_server.rb 112 in `fork'
42 /usr/lib/ruby/gems/1.8/gems/passenger-2.0.3/lib/passenger/abstract_server.rb 112 in `start'
43 /usr/lib/ruby/gems/1.8/gems/passenger-2.0.3/lib/passenger/railz/application_spawner.rb 177 in `start'
44 /usr/lib/ruby/gems/1.8/gems/passenger-2.0.3/lib/passenger/spawn_manager.rb 218 in `spawn_rails_application'
45 /usr/lib/ruby/gems/1.8/gems/passenger-2.0.3/lib/passenger/spawn_manager.rb 213 in `synchronize'
46 /usr/lib/ruby/gems/1.8/gems/passenger-2.0.3/lib/passenger/spawn_manager.rb 213 in `spawn_rails_application'
47 /usr/lib/ruby/gems/1.8/gems/passenger-2.0.3/lib/passenger/spawn_manager.rb 122 in `spawn_application'
48 /usr/lib/ruby/gems/1.8/gems/passenger-2.0.3/lib/passenger/spawn_manager.rb 247 in `handle_spawn_application'
49 /usr/lib/ruby/gems/1.8/gems/passenger-2.0.3/lib/passenger/abstract_server.rb 317 in `__send__'
50 /usr/lib/ruby/gems/1.8/gems/passenger-2.0.3/lib/passenger/abstract_server.rb 317 in `main_loop'
51 /usr/lib/ruby/gems/1.8/gems/passenger-2.0.3/lib/passenger/abstract_server.rb 168 in `start_synchronously'
52 /usr/lib/ruby/gems/1.8/gems/passenger-2.0.3/bin/passenger-spawn-server 46