PI-OPC Interface stopped pulling data after sometime

Hi all,

Help me! I just setup PI-OPC Interface in client new API Node (Window 7). It run normally in run interactive mode. Then I try to run in services. Data also being pulled smoothly. But after sometime like 1 hour it stopped pulling any data from OPC suddenly. Without any error in message log and event viewer. The services also not terminated. It still running.

This is what I have done in configuration:
1. DCOM configuation
2. Create static route because they have 2 different gateway.
3. Setup OPCInt to pull data from DeltaV server.
4. Set pi-opcint & opcenum logon services as DCOM user setting.

Both communication are connected. I can ping to DeltaV and can apisnap to PI server. This is my first time to setup PI-OPC with DeltaV. Anyone who have experience like me please helpppp!

Thanks...