thanks for the reply,
I have try to connect from different location. I don't have problem on the same chair. i happen to get the problem when connect from outside.
and i haven't have the chance to test on other router yet. but i believe it should be fine because the port forwarding is working. (Tested on TCP/UDP P2P e.g. torrent, emule and u name it, no problem) I also try forwarded both tcp and udp.
maybe is the firmware? because i believe the firmware is never been updated before and i am using the latest Video Server E.