Internet Transfer Control: Cannot get "POST" to work.

[Edd]

I am trying to "POST" some XML stuff to a webserver, using the Internet Transfer control. When running the Execute command, with "POST"... the StateChanged event never occurs.

Here is a portion of the code that I have:

   Inet1.Protocol = icDefault
   Inet1.AccessType = icUseDefault
   Inet1.RequestTimeout = 10
   
   strUrl = "[URL unfurl="true"]https://microsoft.com"[/URL]

   Inet1.Execute strUrl, "POST", "XML=" & _
      Replace(xmlDoc.xml, " ", "+"), _
      "Content-Type:application/x-[URL unfurl="true"]www-form-urlencoded"[/URL]

BUT, when I use the OpenUrl method instead of Execute, the StateChanged event does occur. I need to be able to use the Execute method so that I can get the resulting data asynchronously with the GetChunk method.

Any ideas as to why this isn't working for me?
I'm using VB6.