Not found RSLinx OPC server when connect between RSlogix5000 V17 with Factory Talk view machine
I still connect previously normal ,but on a nice day ,it automatically stop that they can never connect.
In new project factory talk view studio ,I selected Add new server and choose OPC data server .OPC data server properties diaog appear .In General tag is project name , OPC server name (ProgID) I select browse and select an OPC data server .
It is at first RSLinx OPC server .....etc. but now it has only localhost and i do not choose.
Please help me.

PS : But with RSView 32 is running normally.