我刚安装了rails 3.0.1，当我尝试做类似rails server的操作时，我在下面看到了错误消息。更改我的应用程序正在使用的版本或导轨
注意第一行说它找不到rails gem 3.0.0.rc： 在任何gem s 资源中都找不到gem'rails（= 3.0.0.rc，runtime）'。 （Bundler :: GemNotFound）
如何让我的rails3应用程序使用rails 3.0.1？
谢谢，
-p.s.完整的错误：
C：/Ruby192/lib/ruby/gems/1.9.1/gems/bundler-1.0.3/lib/bundler/resolver.rb：280：在 resolve': Could not find gem 'rails (= 3.0.0.rc, runtime)' in any of the gem s ources. (Bundler::GemNotFound) from C:/Ruby192/lib/ruby/gems/1.9.1/gems/bundler-1.0.3/lib/bundler/resol ver.rb:162:in启动” 从C： /Ruby192/lib/ruby/gems/1.9.1/gems/bundler-1.0.3/lib/bundler/resol ver.rb：131：在block in resolve' from C:/Ruby192/lib/ruby/gems/1.9.1/gems/bundler-1.0.3/lib/bundler/resol ver.rb:130:in catch' from C：/ Ruby192/lib/ruby/gems/1.9.1/gems/bundler-1.0.3/lib/bundler/resol ver.rb：130：resolve' from C:/Ruby192/lib/ruby/gems/1.9.1/gems/bundler-1.0.3/lib/bundler/defin ition.rb:153:in从C：/Ruby192/lib/ruby/gems/1.9.1/gems/bundler-1.0解析' .3/lib/bundler/defin ition.rb：93：specs' from C:/Ruby192/lib/ruby/gems/1.9.1/gems/bundler-1.0.3/lib/bundler/defin ition.rb:137:in specs_for' from C：/Ruby192/lib/ruby/gems/1.9.1/gems/bundler-1.0.3/lib/bundler/defin ition.rb：126：requested_specs' from C:/Ruby192/lib/ruby/gems/1.9.1/gems/bundler-1.0.3/lib/bundler/envir onment.rb:23:in requested_specs' from C：/Ruby192/lib/ruby/gems/1.9.1/gems/bundler-1.0.3/lib/bundler/runti me.rb：11：in setup' from C:/Ruby192/lib/ruby/gems/1.9.1/gems/bundler-1.0.3/lib/bundler.rb:10 0:in设置 ' 从C：/用户/ soheil /文档/集锦工作室3工作区/ pakrat-Rails3中/ C onfig /的boot.rb：5：在<top (required)>' from <internal:lib/rubygems/custom_require>:29:in需要' 从 ：29：在require' from script/rails:8:in'