Set Printer Delivery Extension Default Page Size

I have set up the sample Printer Delivery Extension as per the MSDN.
The Delivery code works but the page is printing in Letter size 8.5/11.5 inches
I wish the default size to be A4 21.0x29.7 cm.
I have changed the C#. as below.
Rebuilt the assembly and copied the to the reporting server, place the code in the correct folders, restarted IIS and Report Server.

The changed as seen on the subsciption page. Ie the new default sizes are 21.0 and 29.7, BUT the report still prints out in letter size.

Any Ideas?
Thanks


PrinterDeliveryProvidor.cs
              // Setting for page height
                    m_settings[1] = new Setting();
                    m_settings[1].Name = SubscriptionData.PAGEHEIGHT;
                    m_settings[1].ReadOnly = false;
                    m_settings[1].Required = true;
                    m_settings[1].Value = "29.7";

                    // Setting for page width
                    m_settings[2] = new Setting();
                    m_settings[2].Name = SubscriptionData.PAGEWIDTH;
                    m_settings[2].ReadOnly = false;
                    m_settings[2].Required = true;
                    m_settings[2].Value = "21.0";
                }

 // Correctly format device info strings
                string pageWidth = data.pageWidth + "cm";
                string pageHeight = data.pageHeight + "cm";
                string deviceInfo;


and PrinterDeliveryUIProvidor.cs

{
        // Variables used to store information about the subscription being created
        private double m_pagewidth = 21.0;
        private double m_pageheight = 29.7;
        private ArrayList m_printers;



and subscriptiondata.cs


        // Initalize variables to default values
        public string Printer = "";
        public double pageHeight = 29.7;
        public double pageWidth = 21.0;