How do you access environment specific variables?

The documents seem a little out of date on the wiki

http://wiki.rubyonrails.org/rails/pages/EnvironmentFiles
http://wiki.rubyonrails.org/rails/pages/HowtoAddYourOwnConfigInfo

I am trying to set a value for development for sandboxing using a
merchant facility

#environments/production
MERCHANT_ID = "123"

How do I access this in controllers etc?

Thanks

Chalkers

I restarted the server and worked :S sorry guys!