[jQuery] BlockUI 1.33 $.blockUI.defaults.pageMessage is not showing the image

[scroll]

hi,
i´ve this:
-------------------------------------------------------------------
$().ajaxStop($.unblockUI);

function test() {
        $.ajax({ url: 'process.php?' + new Date().getTime() });
}

$(document).ready(function() {
        $('#Submit').click(function() {
                $.blockUI.defaults.pageMessage = '<h1><img 
src="ajax-loader.gif" />
Por favor aguarde...</h1>';
                $.extend($.blockUI.defaults.overlayCSS, { backgroundColor:
'#e9eaea' });
                $.extend($.blockUI.defaults.pageMessageCSS, { color: '#000',
backgroundColor: '#e9eaea' });
                $.blockUI();
                setTimeout($.unblockUI, 3000);
        });
});
-------------------------------------------------------------------

Everything is ok, however is NOT showing the image (<img src="ajax-
loader.gif" />), and it´s in the right place.

any ideia ?

ps - BlockUI 1.33

regards,