Hello Jitender,
What is the toggle you added to the VS to route the request to the live queue?
Could you add more details on why this is not working for you? Is the Live Invocation step failing, what is the exception you are seeing?
If you would like to change the execution mode manually, you can change it in the DevTest Portal under Monitor, Virtual Service Environment, VSE and under the Execution Mode column select the pencil icon and change the mode to Live Invocation.
You can also find more information in the link below:
Monitor Virtual Services - DevTest Solutions - 10.1 - CA Technologies Documentation
Thanks,
Heloisa