Using POSTMAN how can test a connection with ABB Robot Virtual Controller

I am a newbie trying to add some command support using Web services.
I have setup the ABB robot studio and able to move the controller using virtual pendant.
I have enabled the RobotWebServices in the communication firewall section too.
Now i want to use POSTMAN application to test web service command.
For testing, i am trying to get the state of the virtual controller by 

http://127.0.0.1/rw/system?resource=state

But i get HTTP error 404.

How do i resolve the communication issue between Postman and Virtual controller.

Is there any manual, on how to setup a ABB robot studio as virutal simulation and test with Robot web service using POSTMAN.