Environment : development

I changed the varible on my enviroment file to use production..
and is using it.. I can tell by the mysql logs ..
but when I do an about at rails it still says development.. why?
About your application's environment
Ruby version 1.8.6 (x86_64-linux)
RubyGems version 0.9.4
Rails version 1.2.6
Active Record version 1.15.6
Action Pack version 1.13.6
Action Web Service version 1.2.6
Action Mailer version 1.3.6
Active Support version 1.4.4
Application root /var/www/mailadmin.pangeamedia.com/htdocs/mailadmin
Environment development
Database adapter mysql
Database schema version 3