Problem while using ActionMailer with rails 1.1.6

Hi, all

I am new to rails. While I tried to send email by configuring the
email sending than my application could not started.

My environment.rb is as follows :

# Be sure to restart your web server when you modify this file.

# Uncomment below to force Rails into production mode when
# you don't control web/app server and can't set it the proper way
# ENV['RAILS_ENV'] ||= 'production'

# Specifies gem version of Rails to use when vendor/rails is not
present
RAILS_GEM_VERSION = '1.1.6'

# Bootstrap the Rails environment, frameworks, and default
configuration
require File.join(File.dirname(__FILE__), 'boot')

Rails::Initializer.run do |config|

ActionMailer::Base.delivery_method = :sendmail

require '0-13-1_cti_instantiation_patch'

  # Settings in config/environments/* take precedence those specified
here

  # Skip frameworks you're not going to use (only works if using
vendor/rails)
  # config.frameworks -= [ :action_web_service, :action_mailer ]

  # Add additional load paths for your own custom dirs
  # config.load_paths += %W( #{RAILS_ROOT}/extras )

  # Force all environments to use the same logger level
  # (by default production uses :info, the others :debug)
  # config.log_level = :debug

  # Use the database for sessions instead of the file system
  # (create the session table with 'rake db:sessions:create')
  # config.action_controller.session_store = :active_record_store

  # Use SQL instead of Active Record's schema dumper when creating the
test database.
  # This is necessary if your schema can't be completely dumped by the
schema dumper,
  # like if you have constraints or database-specific column types
  # config.active_record.schema_format = :sql

  # Activate observers that should always be running
  # config.active_record.observers = :cacher, :garbage_collector

  # Make Active Record use UTC-base instead of local time
  # config.active_record.default_timezone = :utc

  # See Rails::Configuration for more options
end

# Add new inflection rules using the following format
# (all these examples are active by default):
# Inflector.inflections do |inflect|
# inflect.plural /^(ox)$/i, '\1en'
# inflect.singular /^(ox)en/i, '\1'
# inflect.irregular 'person', 'people'
# inflect.uncountable %w( fish sheep )
# end

# Include your application configuration below

ActionMailer::Base.smtp_settings = {
  :address => "smtp.host.com",
  :port => 465,
  :user_name => "admin@host.com",
  :password => "pass",
  :authentication => :login
}

when i write to run application on console : ruby script/server

Got the message on console and application could not started.

Pls, help me as soon as possible. Thanks in advance.