[jQuery] XML parsererror?? Where's the problem?

[jQuery] XML parsererror?? Where's the problem?


Hi all, greets for the useful group about jQuery.
I'm in needing of a little help, because I'm stuck at an endless
point.
I've created a little search script using jquery, that asks a page for
an xml (based on the query) and prints out some params on the html
parent page.
Here's the code:
::: searchPage.htm
----------------------------------------------------------------------------------------------
<html>
<head>
    <title>Prova ricerca</title>
    <script type="text/javascript" src="jquery.js"></script>
    <script type="text/javascript">
        $(function() {
            $('#submitButton').click(function() {
                var query = $("#query").val();
                $.ajax({
                    type: 'POST',
                    url: 'test.php',
                    data: 'q=' + query + '&p=1&rpp=10',
                    dataType: 'xml',
                    error: function(request, type) {
                        $('#filling').html(request.responseText);
                        alert(type);
                    },
                    success: function(xml) {
                        $(xml).find('label').each(function() {
                            var prova = $(this).find('name').text();
                            $('#filling').append(prova + "
");
                        });
                    }
                });
            });
        });
    </script>
</head>
<body>
<input type="text" id="query">
<input type="submit" value="cerca" id="submitButton">
<div id="filling"></div>
</body>
</html>
----------------------------------------------------------------------------------------------
Here's an example of the XML output of test.php
::: test.php XML output
----------------------------------------------------------------------------------------------
<?xml version="1.0" encoding="iso-8859-1"?>
<root>
<labels>
<label>
<name>EzraPound</name>
<address>
<street>45UsuraPlace</street>
<city>Hailey</city>
<province>ID</province>
</address>
</label>
</labels>
</root>
----------------------------------------------------------------------------------------------
The problem is that the javascript never reaches the success function
and stays stuck @ the function error, printing out the XML response
correctly and alerting me with the "parsererror" message ( the type
variable of error: function(request, type) )
Where's the problem? What do i have to do?
Thanks in advance!