Why Flock doesn't keep the online status of facebook chat at start-up? Is there a way to set it automatically?

When i start-up Flock, the facebook chat status in the lower bar is always "offline", even if the last time I closed the browser it was set on "Online". Is this an issue or there's a way to set-up something so that Flock keeps the status "online" by default at start-up?

My configuration: Flock 2.5, Windows Vista SP1

Thank you,

Andrea