[Rails] Error starting server

OS: Windows Server 2008 Ruby: ruby 1.9.1p378 (2010-01-10 revision 26273) [i386-mingw32] Rails: Rails 2.3.5 Rails app created with: Rails 1.2.5 --- When I try to start the server, a window pops up with the following message: ==

[Rails] Error starting server after freezing rails

I tried to freeze Rails version 1.2.3, but after doing so I get this error when starting my development server: ./script/../config/../vendor/rails/railties/lib/initializer.rb:43:in `send': undefined method `install_gem_spec_stubs' for # (NoMethodError) from ./script/../config/../vendor/ra