Post XML file to remote server

I am attempting to use a gateway to an external interface for data exchange between my institution and an external site. Data is exchanged using XML documents defined by the third party. I am new to XML and have been able to get a 200 OK response from the external server, but the anticipated result of rates on the site changing does not occur.

Can you review the code below and point me in a direction as to where I might be going wrong?

Below is my attempt at the post code and also the xml file. I have followed the remote companies example xml file and it should be good, my main concern is with the post code.

Also, attached is their Rate Integration Guide.

Assistance would be greatly appreciated.

Dim xmlDoc
Dim xmlHTTP 
Dim ConfirmationXML
Set xmlDoc = server.CreateObject("Microsoft.XMLDOM")
xmlDoc.async = False
xmlDoc.Load "E:\file.xml"
Set xmlHTTP = server.CreateObject("WinHttp.WinHttpRequest.5.1")
xmlHTTP.Open "POST",
"https://test-interface.mortgagewebcenter.com/XML/Gateway.asp", False
xmlHTTP.send xmlDoc.xml
xmlHTTP.WaitForResponse
ConfirmationXML = xmlHTTP.Status & " " & xmlHTTP.StatusText
Set xmlDoc = Nothing
Set xmlHTTP = Nothing
response.Write(ConfirmationXML)
 
 
 
<?xml version="1.0" encoding="UTF-8"?>
<TRANSACTION Type="MR_HTTPS_01" ProcessFeedback="Error" >
<MWC_AUTHENTICATION>
<USER_CODE>######</USER_CODE>
<PASSWORD>#######</PASSWORD>
<DOMAIN_CODE>#######</DOMAIN_CODE>
</MWC_AUTHENTICATION>
<RATE_UPLOAD>
<PARTNER Partner_Id="123"/>
<RATE_DATA>
PARTNER_ID,PRODUCT_ID,STATE_ID,COUNTY_CODE,MIN_LOAN_AMOUNT,MAX_LOAN_AMOUNT,L
OCK_PERIOD_ID,RATE,POINTS,REBATE,LOCK_EXPIRATION_DATE,ARM_INDEX_VALUE,HEQ_LO
C_MARGIN,
2761,0,3,0,1000000,4.75,0,0,10/1/08,0,
19053,0,3,0,1000000,4.75,0,0,10/1/08,0,
2767,0,3,0,1000000,4.75,0,0,10/1/08,0,
2811,0,3,0,1000000,4.75,0,0,10/1/08,0,
2762,0,3,0,1000000,4.75,0,0,10/1/08,0,
2812,0,3,0,1000000,4.75,0,0,10/1/08,0,
2763,0,3,0,1000000,4.75,0,0,10/1/08,0,
2813,0,3,0,1000000,4.75,0,0,10/1/08,0,
2768,0,3,0,1000000,4.75,0,0,10/1/08,0,
2769,0,3,0,1000000,4.75,0,0,10/1/08,0,
8303,0,3,0,1000000,4.75,0,0,10/1/08,0,
8304,0,3,0,1000000,4.75,0,0,10/1/08,0,
2764,0,3,0,1000000,4.75,0,0,10/1/08,0.64,
2765,0,3,0,1000000,4.75,0,0,10/1/08,0.64,
7893,0,3,0,1000000,4.75,0,0,10/1/08,0.64,
2766,0,3,0,1000000,4.75,0,0,10/1/08,0.64,
7894,0,3,0,1000000,4.75,0,0,10/1/08,0.64,
7769,0,3,0,1000000,4.75,0,0,10/1/08,0.64,
7770,0,3,0,1000000,4.75,0,0,10/1/08,0.64,
16779,0,3,0,1000000,4.75,0,0,10/1/08,0.64,
16780,0,3,0,1000000,4.75,0,0,10/1/08,0.64,
</RATE_DATA>
</RATE_UPLOAD>
</TRANSACTION>

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MortgagebotRateIntegrationGuide.doc