How to show newly created SSRS report design in PurchPurchaseOrder in Ax 2012 R2

Hi All 

ALD/Procurement and sourcing/Common/Purchase orders/All purchase orders

I follow below link to show the new design in  PurchPurchaseOrder report , But is not  working 

https://axmentor.wordpress.com/2014/04/16/show-newssrsreportdesign-printmanagement/

And I  customize PurchPurchaseOrderController main method below  its displaying ,But is not work

public static void main(Args _args)
{
SrsReportRunController formLetterController = PurchPurchaseOrderController::construct();
PurchPurchaseOrderController controller;

if (TradeFormHelper::isCalledFromForm(_args, formStr(VendPurchOrderJournalListPage)))
{
_args.record(VendPurchOrderJour::findRecId(_args.record().RecId));
}

controller = formLetterController;

if(_args.menuItemName() == menuitemOutputStr(PurchorderVatReport))
{

controller.initArgs(_args, ssrsReportStr(PurchPurchaseOrder, VATReport));
}
else
{
controller.initArgs(_args, ssrsReportStr(PurchPurchaseOrder, Report));
}

if (classIdGet(_args.caller()) == classNum(PurchPurchOrderJournalPrint))
{
formLetterController.renderingCompleted += eventhandler(purchPurchOrderJournalPrint::renderingCompleted);
}

formLetterController.startOperation();
}

I want to add new design in purchpurchaseorder report  ,  Please give  idea to solve this issues 

Best Regards

Shiva