Как вызвать метод веб-службы .Net из классического ASP с помощью SOAP

Я пытаюсь вызвать веб-службу .Net из классического ASP с помощью SOAP. Я создал следующий код в качестве теста и продолжаю возвращать пустое тело ответа с ошибкой 400 Bad Request. Я что-то делаю не так, или эта проблема может быть на стороне .Net?

'set up xmlhttp to checkout server
Dim oRequest
Set oRequest = Server.CreateObject("MSXML2.ServerXMLHTTP")

'setting this option will allow ServerXMLHTTP to ignore the certificate errors it encounters.
oRequest.setOption(2) = SXH_SERVER_CERT_IGNORE_ALL_SERVER_ERRORS


' resolve, connect, send, receive - in milliseconds
oRequest.setTimeouts 10000, 10000, 10000, 10000

'set the URL
msURL = "[redacted]"

msSOAP = "<?xml version=""1.0"" encoding=""utf-8"" ?>"
msSOAP = msSOAP & "<soap12:Envelope xmlns:xsi=""http://www.w3.org/2001/XMLSchema-instance"" xmlns:xsd=""http://www.w3.org/2001/XMLSchema"" xmlns:soap12=""http://www.w3.org/2003/05/soap-envelope"">"
msSOAP = msSOAP & "<SOAP:Body>"
msSOAP = msSOAP & "<[Some Service] xmlns=""http://localhost"">"
msSOAP = msSOAP & "<MethodName>"
msSOAP = msSOAP & "<methodParam1>[some value]</methodParam1>"
msSOAP = msSOAP & "<methodParam2>[some value]</methodParam2>"
msSOAP = msSOAP & "<methodParam3>[some value]</methodParam3>"
msSOAP = msSOAP & "</MethodName>"
msSOAP = msSOAP & "</[Some Service]>"
msSOAP = msSOAP & "</SOAP:Body>"
msSOAP = msSOAP & "</soap12:Envelope>"

oRequest.Open "POST", msURL, False
oRequest.setRequestHeader "Content-Type", "text/xml"
oRequest.setRequestHeader "SOAPMethodName", "[MethodName]"
oRequest.setRequestHeader "SOAPAction", "[Some Url]"
oRequest.send msSOAP

Response.Write oRequest.ResponseBody