Using a rake task to import data into a database: file as follows

    namespace :db do

  desc "load imported data from csv"
  task :load_csv_data => :environment do
    require 'fastercsv'
    require 'chronic'

    FasterCSV.foreach("input.csv", :headers => true) do |row|
      Trade.create(
        :name => row[0],
        :type => row[4],
        :price => row[6].to_f,
        :volume => row[7].to_i,
        :bidprice => row[10].to_f,
        :bidsize => row[11].to_i,

        :askprice => row[14].to_f,
        :asksize => row[15].to_i
        )
      end
    end
  end

When attempting to use this, with the right CSV files and the other elements in place, it will say Don't know how to build task 'db:import_csv_data'

I know this structure works because I've tested it, I'm just trying to get it to convert to the new values on the fly.

Suggestions?