Index: lams_central/web/includes/javascript/addLesson.js
===================================================================
diff -u -r03d58ffa7fa472912057c4a91a9acd1e7f8ffb5e -r0993bbd812a25ddb84feec64dd0e4847ce32d164
--- lams_central/web/includes/javascript/addLesson.js	(.../addLesson.js)	(revision 03d58ffa7fa472912057c4a91a9acd1e7f8ffb5e)
+++ lams_central/web/includes/javascript/addLesson.js	(.../addLesson.js)	(revision 0993bbd812a25ddb84feec64dd0e4847ce32d164)
@@ -222,10 +222,6 @@
 		}
 	});
 
-	$('#presenceEnableField').change(function(){
-		$('#imEnableField').prop('disabled', !$(this).is(':checked'));
-	});
-
 	$('#schedulingEnableField').change(function(){
 		if ($(this).is(':checked')) {
 			$('#scheduleStartTime').show('slow');