HTTPS in AS3 - Error #2044: Unhandled ioError:. text=Error #2032

1

I am trying to knock up a Yammer client in flash10/as3 (in CS4) but it just wouldn’t want to take my https requests. (when i change to http:// the request is compiled correctly and being sent.)

When I try to run the code below as is(as https) it throws the following error:
Error opening URL 'https://www.yammer.com/oauth/request_token?’
Error #2044: Unhandled ioError:. text=Error #2032: Stream Error. URL: https://www.yammer.com/oauth/request_token?

The code: (I omitted the irrelevant part of the code here…)

var loader:URLLoader = oauth.getRqToken(“https://www.yammer.com/oauth/request_token”);
loader.addEventListener(Event.COMPLETE, requestTokenHandler);

function requestTokenHandler(e:Event):void
{
var mysr = e.currentTarget.data;
textWindow1.text=mysr;

}
.
.
.
public function getRqToken( url : String ) : URLLoader {
return new URLLoader( getRqTokenRequest( url ) );
}
.
.
.

public function getRqTokenRequest( url : String ) : URLRequest {
var oauthRequest:OAuthRequest = new OAuthRequest( “POST”, url, null, consumer, null );
var request:URLRequest = new URLRequest( url );
request.method = URLRequestMethod.POST; // POST as per Yammer specifications
request.data=" ";
request.requestHeaders.push(reqHeader); //Add header to the Yammer token_request
return request;
}