Interesting. I would check if mod_event_socket is running (netstat -an | grep 8021). Also, try fs_cli with explicit IP: fs_cli 127.0.0.1 or fs_cli [your_IP].
OK. So, based on this: netstat -an | grep 8021 your mod_event_socket does not seem to be running. I don't have a ton of experience but it seems related to a misconfiguration in your box (e.g. networking, hosts). Try following this thread: