Simple HTTPPOST Packet Not Being Received

I am attempting to post xml to an affiliate and am having some issues.  The affiliate will only accept the xml as a string in the name-value pair called "XML" on a classic asp page.

Here is the code file I have, which works fine and gets the response "Invalid XML".  I.T. on the other end explained to me that is the message that gets echoed if they get no data on their end from this one statement: XML = Request("xml")
I cant see anything here which would make me think nothing is getting transmitted.
Dim uri As New Uri("http://www.affiliatesite.com?xml=") Dim packet As XmlDocument = New XmlDocument packet.Load(Server.MapPath("../XML/TestDoc.xml")) packet.GetElementsByTagName("id")(0).innerXml = "123" packet.GetElementsByTagName("value1")(0).innerXml = "Val1" packet.GetEle ...