# File lib/campaign_monitor.rb, line 117
  def lists(client_id)
    response = Client_GetLists("ClientID" => client_id)
    unless response["Code"].to_i != 0 
      response["List"].collect{|l| List.new(l["ListID"].to_i, l["Name"])}
    else
      raise response["Code"] + " - " + response["Message"]
    end
  end