daily logger not working?

If you want a controller specific logger, you should over-write the
the inherited @logger attribute and provide an accessor for it.

  attr_accessor :logger
  def initialize
    super
    @logger = Logger.new('try.log')
  end

  ...

If you want a rails-wide logger over-ride, you'll need to do it in
config/environment*

One caveat -- in clustered setups using Ruby-specific log rotation is
a huge no-no and will cause you massive headaches in the future. You
should rely on some sort of external log rotation solution (logrotate,
etc) for those.

There are a few packages out there. This is what I use:
http://iain.cx/src/logrotate/