OptoOPCServer problem

Hi all,
I am building OptoOPCServer in Win7 Pro and got some strange problem.
All the setting are following manual, and I can connect successful via Prosys OPC Client to verify the tags in my another client PC (Win10 Pro).
Then the problem coming, when I use PAC Display and set the scanner as OPC Server, then show the message as photo.
If I use the PC which is OPC-Server, both Prosys OPC Client abd PAC Display worked fine.
But OptoOPCServer won’t show client information even local or remote.
The PAC project is R10.1a.
Hope someone can help me on it
Thank you veyr much.