Hi Dario,
In the client page, I changed :
function startEngine(eng) {
// eng.context.setDebugAlertsOnClientError(false);
eng.policy.setMaxBandwidth(30);
eng.policy.setIdleTimeout(30000);
eng.policy.setPollingInterval(1000);
eng.connection.setLSHost(null);
eng.connection.setLSPort(null);
eng.connection.setAdapterName("HaSTC");
eng.changeStatus("STREAMING");
}

I think maybe it still was cached. I tried start LS on another computer, it's ok.

Thanks for your support.