You're running into cross domain issues- do you have access to a server-side language (PHP/ASP/RoR etc)?

If so I can probably PM you the code to get around the issue.

You need the domain that serves your page to serve the data rather than requesting it from the remote domain via javascript - so what you'll want to do is grab the data on page-load, or cache it somewhere on your domain and then reference that with your JavaScript block.