Dynamically added form doesn't found in dom?

I'm trying to create a comment module that allows people to reply to comments made by others. For example, if I commented something on someone's website, someone else can reply to my comment (comments nesting).

I have the code below to dynamically add the comment form when someone clicks reply but for some reason DOM can't see it. Any ideas?

$('#add_comment').ajaxForm({
	type: 'post',
	dataType:  'json', 
	beforeSubmit: function() {

	},
	success: function(data) {
		if (data.status == 'success')
		{
			$('#comments').prepend('<table><tr><td>' + data.message + '<a href="#" id="reply">reply</a></td></tr></table><br />');
		}
	}
});

$('a#reply').live('click', function(event) {
	$(this).after('<br /><form action="backstage/dashboard/ajax_add_comment" method="post" accept-charset="utf-8" name="add_comment" id="add_comment"><table><tr><td></td><textarea name="comment" cols="50" rows="5" id="comment" ></textarea><input type="submit" name="button" value="Submit" id="button" class="button"  /></tr></table></form>')
	return false;
});

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