Hi Mone,
I have enabled firebug and there aren't js errors.

Here my configured in html page, i removed "lightstreamer.com" domain :
--------------
var lsPage = new PushPage();
var debugAlerts = true;
var remoteAlerts = false;
var pushHost = null;


//for test
lsPage.context.setDomain(null);

lsPage.context.setDebugAlertsOnClientError(debugAl erts);
lsPage.context.setRemoteAlertsOnClientError(remote Alerts);

lsPage.onEngineCreation = function(lsEngine)
{
lsEngine.context.setDebugAlertsOnClientError(debug Alerts);
lsEngine.context.setRemoteAlertsOnClientError(remo teAlerts);

lsEngine.connection.setLSHost(pushHost);
lsEngine.connection.setLSPort(null);
lsEngine.connection.setAdapterName("HOSE");

lsEngine.policy.setMaxBandwidth(30);
lsEngine.policy.setIdleTimeout(30000);
lsEngine.policy.setPollingInterval(1000);

lsEngine.changeStatus("STREAMING");
}

lsPage.bind();
lsPage.createEngine("SLEngine","ls/");
----
And here my Firebug screen :