cUrl and AsyncPostFromString

I'm having trouble setting up an roURLTransfer and getting back the headers. I'm not sure what I'm doing wrong, I'm mostly using code that I used sucessfully before for this.

I'm trying to pass a username and password over https to a server and extract a returned code from the header.

Here is the cUrl command line that works:

curl -k -u username:password --trace-ascii test.txt --request POST -d "t" https://website.com/user.xml

The code I am looking for is in the trace file, test.txt.

On the Roku I'm just not getting jack back from my asyncPostFromString("t") but an empty roAssociativeArray if I use: msg.GetResponseHeadersArray()
and an empty roArray if I use: msg.GetResponseHeaders().

If I use AsynchGetToString instead I get a pile of headers back, just not the right ones - I think it is following a redirect on that page which is intended for browsers, but curl doesn't seem to follow, but the Roku appears to.

Here's the code:

function GetHeaders(username as string, password as string) as object
	xfer = CreateObject("roUrlTransfer")
	xfer.EnableFreshConnection(true)
	xfer.SetCertificatesFile("common:/certs/ca-bundle.crt")	
	xfer.seturl("https://website.com/user.xml")
	xfer.SetUserAndPassword(username,password)

	xport=CreateObject("RoMessagePort")
	xfer.setport(xport)
	if (xfer.asyncPostFromSTring("t"))
		?"xfer.async is true"
		msg = wait(0,xport)
		?"we should have a message"
		if type(msg) = "roUrlEvent"
		  ?"ok we have a url event"
		hedone={}
		hedtwo={} 
		  hedone=msg.GetResponseHeadersArray()
		  hedtwo=msg.GetResponseHeaders()		  
		  event={result:hedone, headers:hedtwo}		
		end if
	end if
	return event
End Function