[jQuery] Upgrade to jquery 1.3.2 and the ajax function not work....

[jQuery] Upgrade to jquery 1.3.2 and the ajax function not work....


Width jquery 1.2.6 i have a function as
function get_dati_gerachia(volte){
    var chosenItemText = $("select[name='dati_gerarchia']").val();
     a="volte="+volte
+"&id=2&ordine_per=2&pagine=1&master=4&dati="+chosenItemText
+"&livello=3&menu_pagine_aggiunte=6";
     $.ajax({
     type: "POST",
     url: "ad/dati_gerarchia.php",
     data: a,
     success: function(msg){
        .....
And a php function with a
....
$volte=$_POST['volte'];
$id=$_POST['id'];
..... eccc
When i have chenge the jquery 1.2.6 with the 1.3.2 i get an error PHP
Undefined index : volte...
I don't understand the error; i have also set the
dataType:text,
for the ajax js function but i get also the error... My php is 5.2
Thank you