YAML config files with environment specific settings

[RubyNewbie]

I need to store settings by environment but started off simply with my
config file at: \config\config.yml. The only setting I had was this:
attachment_volume: \\attach\transfers

With this, cod I'm able to load the file within my initializer and
reference it just fine from calling code within an ActiveRecord model
class. So far so good.

Since this setting is a server location that varies by environment, I
tried to use the by-environment structure and changed my config file
to this:
development:
attachment_volume: \\attach\transfers

test:
attachment_volume: \\attach\test\transfers

I get the following error during that indicates it didn't like the
second instance of the colon on the second line. Here is the real
error: Uncaught exception: syntax error on line 1, col 20: `
attachment_volume: \\atlas\transfer\greenlight\predevelopment
\attachments'

Here is full error stack:

Exiting C:/Ruby/lib/ruby/1.8/yaml.rb:133:in `load'
C:/Ruby/lib/ruby/1.8/yaml.rb:133:in `load'
C:/Ruby/lib/ruby/1.8/yaml.rb:144:in `load_file'
C:/Ruby/lib/ruby/1.8/yaml.rb:143:in `open'
C:/Ruby/lib/ruby/1.8/yaml.rb:143:in `load_file'
C:/TFS/GreenLight/DEV/server/config/initializers/load_config.rb:2
C:/TFS/GreenLight/DEV/server/vendor/rails/activesupport/lib/
active_support/dependencies.rb:142:in
`load_without_new_constant_marking'
C:/TFS/GreenLight/DEV/server/vendor/rails/activesupport/lib/
active_support/dependencies.rb:142:in `load'
C:/TFS/GreenLight/DEV/server/vendor/rails/activesupport/lib/
active_support/dependencies.rb:521:in `new_constants_in'
C:/TFS/GreenLight/DEV/server/vendor/rails/activesupport/lib/
active_support/dependencies.rb:142:in `load'
./script/../config/../vendor/rails/railties/lib/initializer.rb:550:in
`load_application_initializers'
./script/../config/../vendor/rails/railties/lib/initializer.rb:549:in
`each'
./script/../config/../vendor/rails/railties/lib/initializer.rb:549:i
n `load_application_initializers'
./script/../config/../vendor/rails/railties/lib/initializer.rb:167:in
`process'
./script/../config/../vendor/rails/railties/lib/initializer.rb:112:in
`send'
./script/../config/../vendor/rails/railties/lib/initializer.rb:112:in
`run'
C:/TFS/GreenLight/DEV/server/config/environment.rb:16
C:/Ruby/lib/ruby/site_ruby/1.8/rubygems/custom_require.rb:31:in
`gem_original_require'
C:/Ruby/lib/ruby/site_ruby/1.8/rubygems/custom_require.rb:31:in
`require'
C:/TFS/GreenLight/DEV/server/vendor/rails/activesupport/lib/
active_support/dependencies.rb:153:in `require'
C:/TFS/GreenLight/DEV/server/vendor/rails/activesupport/lib/
active_support/dependencies.rb:521:in `new_constants_in'
C:/TFS/GreenLight/DEV/server/vendor/rails/activesupport/lib/
active_support/dependencies.rb:153:in `require'
C:/Ruby/lib/ruby/gems/1.8/gems/mongrel-1.1.5-x86-mswin32-60/bin/../
lib/mongrel/rails.rb:147:in `rails'
C:/Ruby/lib/ruby/gems/1.8/gems/mongrel-1.1.5-x86-mswin32-60/bin/
mongrel_rails:113:in `cloaker_'
C:/Ruby/lib/ruby/gems/1.8/gems/mongrel-1.1.5-x86-mswin32-60/lib/
mongrel/configurator.rb:149:in `call'
C:/Ruby/lib/ruby/gems/1.8/gems/mongrel-1.1.5-x86-mswin32-60/lib/
mongrel/configurator.rb:149:in `listener'
C:/Ruby/lib/ruby/gems/1.8/gems/mongrel-1.1.5-x86-mswin32-60/bin/
mongrel_rails:99:in `cloaker_'
C:/Ruby/lib/ruby/gems/1.8/gems/mongrel-1.1.5-x86-mswin32-60/lib/
mongrel/configurator.rb:50:in `call'
C:/Ruby/lib/ruby/gems/1.8/gems/mongrel-1.1.5-x86-mswin32-60/lib/
mongrel/configurator.rb:50:in `initialize'
C:/Ruby/lib/ruby/gems/1.8/gems/mongrel-1.1.5-x86-mswin32-60/bin/
mongrel_rails:84:in `new'
C:/Ruby/lib/ruby/gems/1.8/gems/mongrel-1.1.5-x86-mswin32-60/bin/
mongrel_rails:84:in `run'
C:/Ruby/lib/ruby/gems/1.8/gems/mongrel-1.1.5-x86-mswin32-60/lib/
mongrel/command.rb:212:in `run'
C:/Ruby/lib/ruby/gems/1.8/gems/mongrel-1.1.5-x86-mswin32-60/bin/
mongrel_rails:281
C:/TFS/GreenLight/DEV/server/vendor/rails/activesupport/lib/
active_support/dependencies.rb:142:in
`load_without_new_constant_marking'
C:/TFS/GreenLight/DEV/server/vendor/rails/activesupport/lib/
active_support/dependencies.rb:142:in `load'
C:/TFS/GreenLight/DEV/server/vendor/rails/activesupport/lib/
active_support/dependencies.rb:521:in `new_constants_in'
C:/TFS/GreenLight/DEV/server/vendor/rails/activesupport/lib/
active_support/dependencies.rb:142:in `load'
C:/TFS/GreenLight/DEV/server/vendor/rails/railties/lib/commands/
servers/mongrel.rb:64
C:/Ruby/lib/ruby/site_ruby/1.8/rubygems/custom_require.rb:31:in
`gem_original_require'
C:/Ruby/lib/ruby/site_ruby/1.8/rubygems/custom_require.rb:31:in
`require'
C:/TFS/GreenLight/DEV/server/vendor/rails/activesupport/lib/
active_support/dependencies.rb:153:in `require'
C:/TFS/GreenLight/DEV/server/vendor/rails/activesupport/lib/
active_support/dependencies.rb:521:in `new_constants_in'
C:/TFS/GreenLight/DEV/server/vendor/rails/activesupport/lib/
active_support/dependencies.rb:153:in `require'
C:/TFS/GreenLight/DEV/server/vendor/rails/railties/lib/commands/
server.rb:49
C:/Ruby/lib/ruby/site_ruby/1.8/rubygems/custom_require.rb:31:in
`gem_original_require'
C:/Ruby/lib/ruby/site_ruby/1.8/rubygems/custom_require.rb:31:in
`require'
./script/server:3
C:/Ruby/lib/ruby/gems/1.8/gems/ruby-debug-ide-0.4.4/lib/ruby-debug.rb:
101:in `debug_load'
C:/Ruby/lib/ruby/gems/1.8/gems/ruby-debug-ide-0.4.4/lib/ruby-debug.rb:
101:in `debug_program'
C:/Ruby/lib/ruby/gems/1.8/gems/ruby-debug-ide-0.4.4/bin/rdebug-ide:82
C:\Ruby\bin\rdebug-ide:19:in `load'
C:\Ruby\bin\rdebug-ide:19
-e:2:in `load'
-e:2
Uncaught exception: syntax error on line 1, col 20: `
attachment_volume: \\atlas\transfer\greenlight\predevelopment
\attachments'

Has anyone been able to get the by environment structure load to
work? Please advise? Thanks in advance.