pco and opc connectivity issue

Hi Experts,

PCO  and OPC Servers are on different machines. After creating source system and agent instance  I was able to browse the tags on subscription tab.

But getting error as " browsing failed pls check the connectivity".

.net 3.5 framework and opc core components has been installed on pco machine.

Dcom setting have been done on both machines ( opc and pco )

I am able to ping the opc machine from pco machine.

Please help me to solve this issue.

Configuration:

Opc Server : Honeywell Experien R400

Pco            : PCO  2.3 spo3 , window 7

Erro log :

failed to create ConnectivityAgentProxy

While creating source system entered IP address and shown list of opc server available.

Regards,

Raj