it is version 188.8.131.52. I used this version on other unit without problem. I uninstall and re-intall host for a couple of times but it always shows same internet-ID 229-102-703-311 does it mean I did not uninstall it incompletely? Do you mind looking into this ID see if this problem is from host or viewer. I feel it has something do with static IP address since as soon as I click OK , remote stopped. Thank you for reply so quickly.
Version 6.0 on both host and viewer. Windows 10 on both machine. It worked fine until I set up the static ip on the host machine. It disconnect right away. It shows off-line in the viewer. Re-create new connection in viewer, not working. Uninstall and re-install host, not working, tried to connect from viewer in different machine, not working.