I am trying to integrate the code below on Success page via either a block or by , but after placing an order, the page will be displayed without CSS and the tracking code is not receiving data.

<?php //------------------------------------------- // START TAG TRACKING CODE //------------------------------------------- $  customerId = Mage::getSingleton('customer/session')->getCustomerId(); $  lastOrderId = Mage::getSingleton(‘checkout/session’)->getLastOrderId(); $  order = Mage::getSingleton('sales/order'); $  order->load($  lastOrderId); $  orderData = $  order->getData(); $  orderAmount = $  order->getSubtotal(); $  items = $  order->getAllItems(); $  currency = $  order->getOrderCurrency()->getCode(); $  items_string = "";  foreach ($  items as $  item) {     //loop through all the items     //get item category code, quantity & amount in 3 variables and append in thee below string     $  items_string += "&CAT=" + $  itemCategoryCode + "," + $  itemQty + "," + $  itemAmount; }  ?> 

Could someone please help?

Thanks in advance!