Settingslogic缺少设置错误

defaults: &defaults
    redis:
        host: localhost
        port: 6379

development:
    <<: *defaults

    session_key: \"_app_development\"
    session_secret: \"blah_blah_blah\"

test:
    <<: *defaults

    session_key: \"_app_test\"
    session_secret: \"blah_blah_blah\"

class Settings < Settingslogic
    source \"#{Rails.root}/config/application.yml\"

    namespace Rails.env
end

C:/Ruby/1.9.2/lib/ruby/gems/1.9.1/gems/settingslogic-2.0.6/lib/settingslogic.rb:
117:in `method_missing\': Missing setting \'session_secret\'
in path-to-app/config/application.yml (Settingslogic::MissingSetting).

development:
    redis:
        host: localhost
        port: 6379

    session_key: \"_app_development\"
    session_secret: \"blah_blah_blah\"

test:
    redis:
        host: localhost
        port: 6379

    session_key: \"_app_test\"
    session_secret: \"blah_blah_blah\"