rails 与postgresql配置问题

我用的系统是 redhad fc 6
             postgresql 8.1.4
             ruby 1.8.5
             rails1.1.6
             postgres-pr-0.4.0.gem驱动

建数据库没有问题   rails运行也没有问题  但是打开网页的时候就出现问题了
=> Rails application started on http://0.0.0.0:3001
=> Ctrl-C to shutdown server; call with --help for options
[2006-11-24 16:47:47] INFO  WEBrick 1.3.1
[2006-11-24 16:47:47] INFO  ruby 1.8.5 (2006-08-25) [i386-linux]
[2006-11-24 16:47:47] INFO  WEBrick::HTTPServer#start: pid=2998 port=3001
127.0.0.1 - - [24/Nov/2006:17:01:56 CST] "GET /admin HTTP/1.1" 200 0
- -> /admin
[2006-11-24 17:02:00] ERROR MissingSourceFile: no such file to load -- irb
/usr/lib/ruby/site_ruby/1.8/rubygems/custom_require.rb:27:in `gem_original_require'
/usr/lib/ruby/site_ruby/1.8/rubygems/custom_require.rb:27:in `require'
/usr/lib/ruby/gems/1.8/gems/activesupport-1.3.1/lib/active_support/dependencies.rb:147:in `require'
/usr/lib/ruby/gems/1.8/gems/rails-1.1.6/lib/breakpoint.rb:18
/usr/lib/ruby/gems/1.8/gems/activesupport-1.3.1/lib/active_support/dependencies.rb:140:in `load'
/usr/lib/ruby/gems/1.8/gems/activesupport-1.3.1/lib/active_support/dependencies.rb:140:in `load'
/usr/lib/ruby/gems/1.8/gems/activesupport-1.3.1/lib/active_support/dependencies.rb:56:in `require_or_load'
/usr/lib/ruby/gems/1.8/gems/activesupport-1.3.1/lib/active_support/dependencies.rb:30:in `depend_on'
/usr/lib/ruby/gems/1.8/gems/activesupport-1.3.1/lib/active_support/dependencies.rb:85:in `require_dependency'
/usr/lib/ruby/gems/1.8/gems/activesupport-1.3.1/lib/active_support/dependencies.rb:98:in `const_missing'
/usr/lib/ruby/gems/1.8/gems/activesupport-1.3.1/lib/active_support/dependencies.rb:131:in `const_missing'
/usr/lib/ruby/gems/1.8/gems/activesupport-1.3.1/lib/active_support/dependencies.rb:133:in `send'
/usr/lib/ruby/gems/1.8/gems/activesupport-1.3.1/lib/active_support/dependencies.rb:133:in `const_missing'
/usr/lib/ruby/gems/1.8/gems/rails-1.1.6/lib/dispatcher.rb:75:in `reset_after_dispatch'
/usr/lib/ruby/gems/1.8/gems/rails-1.1.6/lib/dispatcher.rb:46:in `dispatch'
/usr/lib/ruby/gems/1.8/gems/rails-1.1.6/lib/webrick_server.rb:115:in `handle_dispatch'
/usr/lib/ruby/gems/1.8/gems/rails-1.1.6/lib/webrick_server.rb:81:in `service'
/usr/lib/ruby/1.8/webrick/httpserver.rb:104:in `service'
/usr/lib/ruby/1.8/webrick/httpserver.rb:65:in `run'
/usr/lib/ruby/1.8/webrick/server.rb:173:in `start_thread'
/usr/lib/ruby/1.8/webrick/server.rb:162:in `start'
/usr/lib/ruby/1.8/webrick/server.rb:162:in `start_thread'
/usr/lib/ruby/1.8/webrick/server.rb:95:in `start'
/usr/lib/ruby/1.8/webrick/server.rb:92:in `each'
/usr/lib/ruby/1.8/webrick/server.rb:92:in `start'
/usr/lib/ruby/1.8/webrick/server.rb:23:in `start'
/usr/lib/ruby/1.8/webrick/server.rb:82:in `start'
/usr/lib/ruby/gems/1.8/gems/rails-1.1.6/lib/webrick_server.rb:67:in `dispatch'
/usr/lib/ruby/gems/1.8/gems/rails-1.1.6/lib/commands/servers/webrick.rb:59
/usr/lib/ruby/site_ruby/1.8/rubygems/custom_require.rb:27:in `gem_original_require'
/usr/lib/ruby/site_ruby/1.8/rubygems/custom_require.rb:27:in `require'
/usr/lib/ruby/gems/1.8/gems/activesupport-1.3.1/lib/active_support/dependencies.rb:147:in `require'
/usr/lib/ruby/gems/1.8/gems/rails-1.1.6/lib/commands/server.rb:30
/usr/lib/ruby/site_ruby/1.8/rubygems/custom_require.rb:27:in `gem_original_require'
/usr/lib/ruby/site_ruby/1.8/rubygems/custom_require.rb:27:in `require'
/usr/lib/ruby/gems/1.8/gems/activesupport-1.3.1/lib/active_support/dependencies.rb:147:in `require'
./script/server:3
-e:4:in `load'
-e:4
127.0.0.1 - - [24/Nov/2006:17:02:04 CST] "GET /favicon.ico HTTP/1.1" 200 0
- -> /favicon.ico
说源文件没有存
但是用rake db：migrete 和rake clone_structure_to_test 测试都没没有问题阿

我的database.yml
development:
  adapter: postgresql
  database: depot_development
  username: vividness
  password: jiangming
  encoding: UTF8

我没遇到过这种情况，不过搜索一下有很多结果，应该是irb没有安装吧，yum install irb

果然是个高手  真的是 irb  没有安装阿
谢谢

faint！

没办法  我是初学者   不好意思出了这么低级的错误