Index: lams_monitoring/web/includes/javascript/monitorLesson.js
===================================================================
diff -u -re25ab1741e8678d3999f24176b9afea732e8b156 -r69a2ea006346d8a4511cf078bd1fd0c8a16a2082
--- lams_monitoring/web/includes/javascript/monitorLesson.js	(.../monitorLesson.js)	(revision e25ab1741e8678d3999f24176b9afea732e8b156)
+++ lams_monitoring/web/includes/javascript/monitorLesson.js	(.../monitorLesson.js)	(revision 69a2ea006346d8a4511cf078bd1fd0c8a16a2082)
@@ -2374,10 +2374,11 @@
  * Adds/removes a Learner/Monitor to/from the class.
  */
 function editClassMember(userCheckbox){
-	var data={ 
+	var data = { 
 		'lessonID' : lessonId,
 		'userID'   : userCheckbox.closest('.dialogListItem').attr('userId'),
-		'role'     : userCheckbox.closest('table.dialogTable').is('#classMonitorTable') ? 'MONITOR' : 'LEARNER',
+		'role'     : userCheckbox.parents('table.dialogTable')
+								 .parents('table.table').is('#classMonitorTable') ? 'MONITOR' : 'LEARNER',
 		'add'      : userCheckbox.is(':checked')
 	};
 	data[csrfTokenName] = csrfTokenValue;