LoadError with UserMailer in Production Mode?

Getting this error everytime i try to use the UserMailer to send an
email, works in development mode, but not in production.

LoadError (Expected /app/models/user_mailer.rb to define UserMailer):

Any ideas?

Using Rails 2.0.2, the user_mailer.rb does define UserMailer just
doesn’t seem to work anymore when running mongrel in production mode.

here’s my configs

production.rb

config.action_mailer.raise_delivery_errors = false

ActionMailer::Base.delivery_method = :sendmail
ActionMailer::Base.sendmail_settings = {
:location => ‘/usr/sbin/sendmail’,
:arguments => ‘-i -t’
}

nothing like this added to environment.rb, am i missing anything?, was
working before.

stuck!