The problem can be solved by the upgrade software Summit Ver.2. from Michal.
I got only 1 error message when install an upgrade on acquisition unit an error about date time between server and client not match. When checked and reset time to match together, then the Summit able to online to Cadlink server again.
(might be the problem from the Cadlink Server have connect to internet and date time or other ways have change cause to the connection was stop without warning) Confirmed by my labtop able to online to Server at that time.