Update Tracking Number No Order Number

Hi,

My context.Request.Params["OrderNumber"] is null in

C:\Program Files (x86)\Z-Firm LLC\ShipRush Developer Tools\Web Application Developer Kit v9.6.0.55558\REDIST\Server-Based-Examples\ASP.NET-Simple-Example-with-Post-Back\update_tracking_number.ashx

Is my XML wrong? I am using the latest ShipRush.

Here is my XML:

shiprush://ship?Carrier=FedEx&orderid=22&ShipmentXML=<?xml version="1.0"?>
<Request><ShipTransaction><Order><OrderDate>6/8/2013</OrderDate><OrderNumber>22</OrderNumber><PostBackURL>http://localhost/KenticoCMS7_2/SRHandler.ashx</PostBackURL>
<ShipmentOrderItem><Name>Item</Name></ShipmentOrderItem></Order><Shipment><UPSServiceType Value = ""/><ShipmentChgType Value = "PRE"/><DeliveryAddress><Address><FirstName Value = "Global Administrator"/><Company Value = ""/><Address1 Value = "123 Main St"/><Address2 Value = ""/><City Value = "Watertown"/><State Value = "MA"/><PostalCode Value = "02472"/><Country Value = "US"/><EMail Value = "administrator@localhost.local"/></Address></DeliveryAddress><Package><PackagingType Value="02" /><PackageActualWeight Value= "1"/><PackageReference1 Value = "22"/></Package></Shipment></ShipTransaction></Request>&PostBackURL=http://localhost/KenticoCMS7_2/SRHandler.ashx