php Session and cookies not work for jquery .load

Question

i use this code for give normal data(html) from subdomain url;

$(document).delegate("#listLastMyUploads",'click',function(){
    $('#files')
    .load('http://accounts.domain.com/test.php');
});

but after load file sessions not worked !;

i use this code for set option sessions php , but not worked :

session_name("myDomain");
ini_set ("session.cookie_domain", '.domain.com') ;
session_set_cookie_params(0, '/', '.domain.com');
session_start();

address without jquery (address bar of browser) is very nice working ..