Connect OPC UA server

Hi,

I want connect OPC UA server with thingworx using OPC UA Client Extension which is downloaded from marketplace.

I can't able to connect with thingworx. 

I have pasted "config.json" and "Thingworx_OPC_UA_Client.jar" at "C:\OPC".

I have modified "config.json" file and started "Thingworx_OPC_UA_Client.jar". At, thingworx property "IsConnected" not updated.

Where i have made mistake?

Thanks.