"Requested method post is not allowed..."

I am attempting to use the HTTP plugin to post to the form at the link:
http://familytreemaker.genealogy.com/ft … earch.html

And then grab the response. I can manually submit the form just fine, however when I use the plugin with the following code the page data response is “Method Not Allowed The requested method POST is not allowed for the URL /fto_ssdisearch.html”.

From what I’ve found searching the internet there seem to be two reasons for this error

  1. The form has name attribute “”
  2. the extension of the form action attribute filename is .exe
    Neither of these makes sense to me because I can manually submit the form without any problem.

Anybody have any suggestions? Is there anything I can do with the Apache HTTPClient package to allow me to post to this form?

All help greatly appreciated :D

Jon

var client = plugins.http.createHttpClient();
var FamilyTreeMaker = plugins.http.getPoster('http://familytreemaker.genealogy.com/fto_ssdisearch.html', 'my_client');

var didAddParam1 = FamilyTreeMaker.addParameter("se", "Thornton");//Lname
var didAddParam2 = FamilyTreeMaker.addParameter("se", "BillyBob");//Fname
var didAddParam3 = FamilyTreeMaker.addParameter("be","012345678");

if(didAddParam1 && didAddParam2 && didAddParam3) {

	var Posted = FamilyTreeMaker.doPost();
	if (Posted) {
		globals.gHTML = FamilyTreeMaker.getPageData();
	}
}