Yeah, from your prints, I don't know how it is not working. How are you checking if it is working or not? How do you know it is not working?
If you want an example, you can just check the Sample Project link that is on the plugin page.
Download that project, go to the Custom Parameter map and test there.
On the Sample Project, everything is working, so you can open it and compare the events and plugin parameters.
Otherwise, take that project you are using and upload it somewhere, then send that link for me. I will download and check it out.