Finally my SWRL tab works perfectly.
I installed Jess and copied jess.jar in the plugin folder and it works correctly.
I have just one problem. Following the jess installation instructions I read that right after the unzip I could create an environment variable JAVA_HOME with the path of the java.exe to use the Jess also from the Command Prompt.
I created the variable and set it with the correct path but I get a message that states that the path is uncorrect because it is not a J2SDK installation.
Does anybody have any idea on how to fix this issue?