require "rubygems"
require "activerecord"
require "csv"
require "ping"

ActiveRecord::Base.establish_connection(
	:adapter => "mysql",
	:host => "na",
	:username => "na",
	:password => "na",
	:database => "pc_inventory")

class Computer < ActiveRecord::Base

end

def online(host)
	Ping.pingecho(host, 1.3, 3389)
end


def dameware(host)
	Ping.pingecho(host, 0.8, 6129)
end


Computer.find(:all, :order => "date DESC").each do |computer|
	online_check = online(computer.ip)
	dameware_check = dameware(computer.ip)
	Computer.update(computer.id, {:online => online_check, :dameware => dameware_check})
end



ERROR I get when I run the .rb file...

online.rb:17: undefined method `online' for main:Object (NoMethodError)