It would have been helpful to say that in your first message.
Unfortunately the github repository does not allow issues to be posted so you can't ask there, but if you go from their to the author's page there is an email address so you could try emailing him.
First, though, add a debug node showing what you are sending to the node to stop it. Set it to Output Complete Message, and show us what you see. Does the node pass on an error message when it fails?
Looking into the source of of the easybotics version of this node, there's no way to start / stop anything.
It yet is a fork of another node, originally created by a person named Mike Skutta. This node has a start / stop scheme ... according to its source.