wxNotificationMessage KO onto Ubuntu 13 about wxphp HOT 2 CLOSED

<?php
class MyApp extends wxApp 
{
    function OnInit()
    {
        $notification = new wxNotificationMessage(
            'test r', 'Mon message', NULL, wxICON_ERROR
        );
        $notification->Show(10);

        return 0;
    }

    function OnExit()
    {
        return 0;
    }
}

$app = new MyApp();
wxApp::SetInstance($app);

wxEntry();