В IE не отрабатывает купон со скидкой.(В остальных браузерах все хорошо.)

if (strlen($_REQUEST["BasketRefresh"]) > 0 || strlen($_REQUEST["BasketOrder"]) > 0 || strlen($_REQUEST["action"]) > 0)
{
   if(strlen($_REQUEST["action"]) > 0)
   {   
      $id = IntVal($_REQUEST["id"]);
      if($id > 0)
      {
         $dbBasketItems = CSaleBasket::GetList(
               array(),
               array(
                     "FUSER_ID" => CSaleBasket::GetBasketUserID(),
                     "LID" => SITE_ID,
                     "ORDER_ID" => "NULL",
                     "ID" => $id,
                  ),
               false,
               false,
               array("ID", "CALLBACK_FUNC", "MODULE", "PRODUCT_ID", "QUANTITY", "DELAY", "CAN_BUY", "CURRENCY")
            );
         if($arBasket = $dbBasketItems->Fetch())
         {
            if($_REQUEST["action"] == "delete" && in_array("DELETE", $arParams["COLUMNS_LIST"]))
            {
               CSaleBasket::Delete($arBasket["ID"]);
            }
            elseif($_REQUEST["action"] == "quantity" && isset($_REQUEST["amount"]) && in_array("DELAY", $arParams["COLUMNS_LIST"]))
            {
               if ($arBasket["DELAY"] == "N" && $arBasket["CAN_BUY"] == "Y")
                  CSaleBasket::Update($arBasket["ID"], Array("QUANTITY" => $_REQUEST["amount"]));
            }
            elseif($_REQUEST["action"] == "change_size" && isset($_REQUEST["new_element"]) && in_array("DELAY", $arParams["COLUMNS_LIST"]))
            {
               if ($arBasket["DELAY"] == "N" && $arBasket["CAN_BUY"] == "Y"){
                     CModule::IncludeModule("iblock");
                     $res = CIBlockElement::GetByID($_REQUEST["new_element"]);
                     $ar_res = $res->GetNext();
                     //pre($ar_res); die;

                  CSaleBasket::Update($arBasket["ID"], Array("PRODUCT_ID" => $_REQUEST["new_element"], "PRODUCT_XML_ID"=>$ar_res["EXTERNAL_ID"]));
               }
            }
            elseif($_REQUEST["action"] == "shelve" && in_array("DELAY", $arParams["COLUMNS_LIST"]))
            {
               if ($arBasket["DELAY"] == "N" && $arBasket["CAN_BUY"] == "Y")
                  CSaleBasket::Update($arBasket["ID"], Array("DELAY" => "Y"));
            }
            elseif($_REQUEST["action"] == "add" && in_array("DELAY", $arParams["COLUMNS_LIST"]))
            {
               if ($arBasket["DELAY"] == "Y" && $arBasket["CAN_BUY"] == "Y")
                  CSaleBasket::Update($arBasket["ID"], Array("DELAY" => "N"));
            }
            unset($_SESSION["SALE_BASKET_NUM_PRODUCTS"][SITE_ID]);
         }
      }
   }
   else
   {
      if ($arParams["HIDE_COUPON"] != "Y")
      {

         $COUPON = Trim($_REQUEST["COUPON"]);

         if (strlen($COUPON) > 0)
            CCatalogDiscount::SetCoupon($COUPON);
         else
            CCatalogDiscount::ClearCoupon();
         LocalRedirect($arParams["PATH_TO_ORDER"]);
      }
                  
      $dbBasketItems = CSaleBasket::GetList(
            array("NAME" => "ASC"),
            array(
                  "FUSER_ID" => CSaleBasket::GetBasketUserID(),
                  "LID" => SITE_ID,
                  "ORDER_ID" => "NULL",
                  "DELAY"=>"N",
                  "CAN_BUY"=>"Y",
                  "SUBSCRIBE"=>"N",
               ),
            false,
            false,
            array("ID", "CALLBACK_FUNC", "MODULE", "PRODUCT_ID", "DELAY", "CAN_BUY", "PRICE", "QUANTITY", "CURRENCY")
         );
                       

      while ($arBasketItems = $dbBasketItems->Fetch())
      {
         $arBasketItems['QUANTITY'] = $arParams['QUANTITY_FLOAT'] == 'Y' ? DoubleVal($arBasketItems['QUANTITY']) : IntVal($arBasketItems['QUANTITY']);

         $quantityTmp = $arParams['QUANTITY_FLOAT'] == 'Y' ? DoubleVal($_REQUEST["QUANTITY_".$arBasketItems["ID"]]) : IntVal($_REQUEST["QUANTITY_".$arBasketItems["ID"]]);

         if ($arBasketItems["DELAY"] == "N" && $arBasketItems["CAN_BUY"] == "Y")
         {
            $arFields = array();
            if (in_array("QUANTITY", $arParams["COLUMNS_LIST"]))
               $arFields["QUANTITY"] = $quantityTmp;
                 
            if (count($arFields) > 0 &&    ($arBasketItems["QUANTITY"] != $arFields["QUANTITY"] && in_array("QUANTITY", $arParams["COLUMNS_LIST"])))
               CSaleBasket::Update($arBasketItems["ID"], $arFields);
         }
      }
   }
   if (strlen($_REQUEST["BasketOrder"]) > 0)
   {
      LocalRedirect($arParams["PATH_TO_ORDER"]);
   }
   else
   {
      unset($_REQUEST["BasketRefresh"]);
      unset($_REQUEST["BasketOrder"]);
      LocalRedirect($APPLICATION->GetCurPage());
   }
}