Your commands are working fine for me, using your test method.
I used a POST request: VC.TriggerEvent&&Listening&&ON
It also worked for me using the same syntax and a GET request. That is, when I typed the following URL in to my browser address bar:
http://127.0.0.1:8080/api/VC.TriggerEvent&&Listening&&On
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Is it possible that you tested these commands before you had saved and exited your command tree?
For events to trigger commands, the tree needs to be rebuilt with the new commands in them. That means you need to either save and exit the command tree window, or use File > Quick Restart if you want to leave the command tree window open.