def build_tracking_request(order_ids, options)
      xml = Builder::XmlMarkup.new :indent => 2
      xml.instruct!
      xml.tag! 'TrackingXML' do
        add_credentials(xml)

        order_ids.each do |o_id|
          xml.tag! 'Tracking' do
            xml.tag! 'Order', o_id
          end
        end
      end
    end
def build_tracking_request(order_ids, options)
      xml = Builder::XmlMarkup.new :indent => 2
      xml.instruct!
      xml.tag! 'TrackingXML' do
        add_credentials(xml)

        order_ids.each do |o_id|
          xml.tag! 'Tracking' do
            xml.tag! 'Order', o_id
          end
        end
      end
    end
<?xml version="1.0"?>
 <TrackingXML>
   <Password>Webgistix</Password>
   <CustomerID>3</CustomerID>
   <Tracking>
     <Order>AB12345</Order>
   </Tracking>
   <Tracking>
     <Order>XY4567</Order>
   </Tracking>
 </TrackingXML>