CSS Background problem [Resolved]

Here is the page - http://chipmunks.queerwomenottawa.net/

Here is the CSS for the body tag:

<style type="text/css">
body
{
    background: url("http://i272.photobucket.com/albums/jj179/mylittlesandwich/chipmunks_certed/chipbk.png");
    background-attachment: fixed;
}
</style>

Anyone have any idea why it is not working in IE or Firefox?

I have tried other CSS methods and none seem to work. I

Thanks!