Odd. Reload and try again. Working fine when I try. If you keep having errors, let me know.
I just tried the 3 methods. Play now and Play in popup, both say file not found. Download file says "We're very sorry, but that page doesn't exist or has been moved.
Please make sure you have the right URL."
I'm using Firefox 12.0 if it matters.
The first two options seem to work in IE9, but not the download option.
I don't have chrome to check.