cannot capture the data I need....

Im trying to extract data from 12bet.com. In the scrapeable file, the URL is http://www.12bet.com/UnderOver_data.aspx. The parameters have all been set up automatically. When I first look at last response, the data I want is there.
When I then run a scraping session,and look at the last response tab again, the data is not there. I just get the following.

HTTP/1.1 200 OK
X-Powered-By: ASP.NET
Content-Length: 0
Date: Mon, 20 Jul 2009 22:26:36 GMT
X-AspNet-Version: 2.0.50727
Server: Microsoft-IIS/6.0
Cache-Control: private

!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN"
"http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd"
html xmlns="http://www.w3.org/1999/xhtml"
head
meta name="generator" content="HTML Tidy, see www.w3.org" /
title> /head
body
[Binary Data]
/body
/html

(ive taken off the "<" and ">"'s so the above would show on the screen..

Therefore all I get back when rendering the html is "[binary data]".
So if I were to apply an extractor pattern I wouldnt get anything.

help...