EAP plugins for JON 3.2.0 don't work as expected

I have just installed JON on a server to monitor the jboss instances on the domain and also installed the EAP plugin for JON on the domain controller.
But JON doesn't see the domain servers' jboss instances. They all show up in the "Unavailable servers" section of the Inventory. Can someone help us out with this? I'm not sure if this is a configuration issue but if someone would like to see the configuration, I would post it here.

Thanks!