Mongrel freeze


I have had trouble with mongrel freezing after a period of
inactivity. Following the advice from the mongrel FAQ, I added:
ActiveRecord::Base.verification_timeout = 14400
to my environment.rb file. Unfortunately, that registered a mongrel
"uninitialized constant ActiveRecord (NameError)"

How do I overcome this one? I tried:
require ActiveRecord::Base
but that registered the same error, only for this line instead.

Thanks, and sorry for the newbie question.

I moved the statement to the config/environments/production.rb
instead. Mongrel started up just fine. Now to see if it stops