LV OPC client cannot get value from remote Matrikon OPC server

Trying to use LV DSC OPC client connect to remote OPC server. Both running on win7.
It seems the link is up, but cannot get data. As the attached screen, the msg is
CoCreateInstanceEx: CLSID=F8582CF2-88FB-11D0-0C0F010435, InstanceType=CLSCTX_ALL, ServerName=\\172.16.5.38, CMQ=1 (FAILed, HRESULT=0x80070005 Access is denied.
While using the MatrikonOPCexplorer can link to remote server and refresh value automatically. But also got error when start up as the attached.
Any suggestion, thanks.
Attachments:
ss.png ‏43 KB
ss2.png ‏214 KB

Likely this is an issue related to DCOM configuration. Can you double check tagsrv.exe ("NI Variable Engine" service ) has the correct DCOM configuration talking to the remote OPC Server?

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