XMLHTTP object woes

Hey,

I'm having some problems with the XMLHTTP object.

I'm using the object to retrieve XML off a remote page. This remote URL is actually a login page, that is supposed to automatically search for a cookie for authentication and then go ahead and go to the XML data. So there's some redirection going on there, that is fine when I do it in a browser window.

However, when I use the XMLHTTP object to get the data from the original URL, it returns me the HTML from the first login page, as opposed to the XML it would have returned had the redirection completed. How do I "wait" for this redirection to happen?

Thanks
Paul