[jQuery] plugin blockUI what do i do wrong ?

[jQuery] plugin blockUI what do i do wrong ?


Exmaple (won't unblock):
<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Strict//EN"
"http://www.w3.org/TR/xhtml1/DTD/xhtml1-strict.dtd">
<html xmlns="http://www.w3.org/1999/xhtml" lang="de" xml:lang="de">
<head>
<meta http-equiv="Content-Type" content="text/html; charset=utf-8" />
<title>TEST</title>
<script type="text/javascript" src="js/jquery/jquery.js"></script>
<script type="text/javascript" src="js/jquery/plugins/jqBlock.js"></script>
<script type="text/javascript">
$j = jQuery.noConflict();
$j(document).ready(function()
{    
    $j.extend($j.blockUI.defaults.overlayCSS, {backgroundColor: '#D4E7F8' });
    $j.extend($j.blockUI.defaults.pageMessageCSS, {border:'none' });
    $j.blockUI.defaults.pageMessage = '<h3 class="warning">Anfrage wird
bearbeitet</h3>

bitte warten ...

';
    $j('.confirm').click (
    function ()
    {
        $prompt = '<div id="Modal"><h3>Wollen Sie diese Frage wirklich
löschen?</h3>

Alle zugehörigrn Antworten gehen somit auch
verloren!

<input type="button" id="ModalYes" value="Ja" /><input
type="button" id="ModalNo" value="Nein" /></div>';
        $j("body").append($prompt);
        $j.blockUI($j("#Modal"), { width: '300px' });
        //
        $j("#ModalYes").click(
            function() {
                $j.unblockUI;
                console.info("you clicked yes");
                return false;
            }
        );
        
        $j('#ModalNo').click(
            function (){
                $j.unblockUI;
                console.info("you clicked NO");
                return false;
            }
        );
        return false;
    });
});
</script>
</head>
<body>

<a href="#" class="confirm">Show</a>


</body>
</html>
faily easy it seems, but somethings broken here ...
micha