Tasker and Mqtt Client Plugin

Hi, I’m new, I’ve looked everywhere but I can not find a solution to my problem.
I would like to use the Mqtt client Plugin with Tasker so that you can associate a message received with a certain subject to an event … but unfortunately I can not, it seems that tasker does not react to the plugin.
I explain what I did: 1) I configured Mqtt Client with broken data and it works correctly; 2) I created a Subscribe; 3) I tried to write a message with the Topic that I had inserted in the Subscribe and on Mqtt client works perfectly; 4) I went on tasker and I clicked on Profile / Create Event / Plugin / MqttClient Msgarrive and I chose the variables for the message and for the topic; 5) At this event I associated an activity, I created a flash that should display a message … but nothing, tasker does not catch! Can someone help me? Thank you very much and sorry the traduzikne with Google.