ui.tabs doesnt support json

when i try do get JSON response for tabs reload i get error : "Node cannot be inserted at the specified point in the

hierarchy",

my code :

$(document).ready(function(){
		$("#example > ul").tabs();
		$("#example > ul").tabs("url",1, 'handle.php');
		$("#example > ul").tabs( { ajaxOptions: {		success : function (data,s)alert(data);},		

					cache: false,							dataType : "json"}
		});
	});

server side code :

<?php
echo "{ test : 123 }";
?>

html : i have 2 tabs, 1 loads static html and second load data from server ( $("#example > ul").tabs("url",1, 'handle.php'); ),

what ive discovered - i cannot overwrite function that is called onsuccess ( "ajaxOptions : { succes : function ()... " ) . I

looked in the source code of ui.tabs and i found this :

var ajaxOptions = $.extend({}, o.ajaxOptions, {
			url: url,
			success: function(r, s) {				
				
				$(a.hash).html(r);
...........

so is this error is caused becouse on success ui.tabs tries to append to page json data? and why i cant overwrite onsuccess

method?. mayby im doing something wrong?