you probably dont have the port opened on your router or dont have the zone external ip set correctly.
in boot5zones.bat it should be like:
start zone . EXTERNAL_IP_HERE 8780 127.0.0.1
start zone . EXTERNAL_IP_HERE 8781 127.0.0.1
start zone . EXTERNAL_IP_HERE 8782 127.0.0.1
start zone . EXTERNAL_IP_HERE 8783 127.0.0.1
start zone . EXTERNAL_IP_HERE 8784 127.0.0.1
where EXTERNAL_IP_HERE can be found here:
http://checkip.dyndns.org/