diff --git a/UI/Scheduler/English.lproj/Localizable.strings b/UI/Scheduler/English.lproj/Localizable.strings
index c38d5b133..5ee1b3bd9 100644
--- a/UI/Scheduler/English.lproj/Localizable.strings
+++ b/UI/Scheduler/English.lproj/Localizable.strings
@@ -544,7 +544,6 @@ vtodo_class2 = "(Confidential task)";
 "DestinationCalendarError" = "The source and destination calendars are the same. Please try to copy to a different calendar.";
 "EventCopyError" = "The copy failed. Please try to copy to a difference calendar.";
 "Please select at least one calendar" = "Please select at least one calendar";
-"An error as occurred please try again" = "An error as occurred please try again";
 
 
 "Open Task..." = "Open Task...";
diff --git a/UI/Templates/SchedulerUI/UIxCalMainView.wox b/UI/Templates/SchedulerUI/UIxCalMainView.wox
index c7ccb8a73..b5e196ae1 100644
--- a/UI/Templates/SchedulerUI/UIxCalMainView.wox
+++ b/UI/Templates/SchedulerUI/UIxCalMainView.wox
@@ -34,7 +34,7 @@
   <div class="preload" style="visibility: hidden;">
     <img rsrc:src="event-gradient.png"/>
   </div>
-  <img rsrc:src="event7.png" id="DnDCalendarList" style="visibility: hidden;"/>
+  <img rsrc:src="event7.png" id="DnDLeftPanelImage" style="visibility: hidden;"/>
   <div class="menu" id="monthListMenu">
     <ul>
       <var:foreach list="monthMenuItems" item="monthMenuItem"
diff --git a/UI/WebServerResources/SchedulerUI.css b/UI/WebServerResources/SchedulerUI.css
index 3c380284c..f3a37aa57 100644
--- a/UI/WebServerResources/SchedulerUI.css
+++ b/UI/WebServerResources/SchedulerUI.css
@@ -1546,7 +1546,7 @@ DIV#dragDropVisual
   padding-top: 5px;
 }
 
-#DnDCalendarList
+#DnDLeftPanelImage
 {
   position:absolute;
   z-index:1;
diff --git a/UI/WebServerResources/SchedulerUI.js b/UI/WebServerResources/SchedulerUI.js
index 1f3156cc0..90e2d99b6 100644
--- a/UI/WebServerResources/SchedulerUI.js
+++ b/UI/WebServerResources/SchedulerUI.js
@@ -3178,16 +3178,19 @@ function dropSelectedEvents(action, toId) {
     if (selectedCalendars.length > 0) {
         var eventIds = $('eventsList').getSelectedRowsId();
         for (var i = 0; i < eventIds.length; i++) {
+        // Find the event ID (.ics)
             if (!eventIds[i].endsWith("ics")) {
+              // If it is a repeated event, substract the occurence part
                 if (eventIds[i].indexOf(".ics")) {
                     var x = eventIds[i].indexOf(".ics") + 4;
                     eventIds[i] = eventIds[i].substr(0,x);
                 }
                 else {
-                    showAlertDialog(_("An error as occurred please try again"));
+                    log("Can't find the event(.ics) on the item dragged : " + eventIds[i]);
                     return false;
                 }
             }
+            // Distinction between personal calendar and a calendar with a reference ID (ex: 4535-7545-B-5D3J)
             if (eventIds[i].search(toId+"-") == -1) {
                 var x = eventIds[i].indexOf('-');
                 if (eventIds[i].indexOf('-') == 4) {
diff --git a/UI/WebServerResources/SchedulerUIDnD.js b/UI/WebServerResources/SchedulerUIDnD.js
index 64258ee9a..137223132 100644
--- a/UI/WebServerResources/SchedulerUIDnD.js
+++ b/UI/WebServerResources/SchedulerUIDnD.js
@@ -977,12 +977,15 @@ function SOGoEventDragLeftPanelController() {
 SOGoEventDragLeftPanelController.prototype = {
     updateLeftPanelVisual : null,
     dropCalendar : null,
+    DnDLeftPanelImage : $("DnDLeftPanelImage"),
 
     setLeftPanelVisual: function SEDLPC_setLeftPanelVisual() {
+        var that = this;
         this.updateLeftPanelVisual = $("leftPanel").on("mousemove", function(e){
-            $("DnDCalendarList").style.left = e.pageX + "px";
-            $("DnDCalendarList").style.top = e.pageY + "px";
+            that.DnDLeftPanelImage.style.left = e.pageX + "px";
+            that.DnDLeftPanelImage.style.top = e.pageY + "px";
         });
+        this.updateLeftPanelVisual.stop();
     },
     
     updateFromPointerHandler: function SEDLPC_updateFromPointerHandler() {
@@ -994,6 +997,16 @@ SOGoEventDragLeftPanelController.prototype = {
         if (hoverCalendar)
             hoverCalendar.addClassName('genericHoverClass');
             this.dropCalendar = hoverCalendar;
+    },
+    
+    startEvent: function SEDLPC_startEvent() {
+        this.DnDLeftPanelImage.style.visibility = 'visible';
+        this.updateLeftPanelVisual.start();
+    },
+    
+    stopEvent: function SEDLPC_stopEvent() {
+        this.DnDLeftPanelImage.style.visibility = 'hidden';
+        this.updateLeftPanelVisual.stop();
     }
 }
 
@@ -1379,7 +1392,7 @@ SOGoEventDragController.prototype = {
         Event.stopObserving(document.body, "mousemove", this.onDragModeBound);
         this.onDragStopBound = null;
         this.onDragModeBound = null;
-        $("DnDCalendarList").style.visibility = 'hidden';
+        this.leftPanelController.stopEvent();
 
         var utilities = SOGoEventDragUtilities();
         if (this.dragHasStarted) {
@@ -1400,7 +1413,6 @@ SOGoEventDragController.prototype = {
                     $$('#calendarList li').each(function(e) {
                                         e.removeClassName('genericHoverClass');
                                         });
-                    this.leftPanelController.updateLeftPanelVisual.stop();
                     calendarID[0] = this.folderClass.substr(14);
                     calendarID[1] = this.leftPanelController.dropCalendar.getAttribute("id").substr(1);
                     delta.start = 0;
@@ -1452,17 +1464,14 @@ SOGoEventDragController.prototype = {
             if (newCoordinates == null && this.leftPanelController != null) {
                 if (this.ghostController.ghosts) {
                     this.ghostController.hideGhosts();
-                    $("DnDCalendarList").style.visibility = 'visible';
-                    this.leftPanelController.updateLeftPanelVisual.start();
-                    
+                    this.leftPanelController.startEvent();
                 }
                 this.leftPanelController.updateFromPointerHandler();
             }
             else {
                 if (this.ghostController.ghosts == null) {
                     this.ghostController.showGhosts();
-                    $("DnDCalendarList").style.visibility = 'hidden';
-                    this.leftPanelController.updateLeftPanelVisual.stop();
+                    this.leftPanelController.stopEvent();
                 }
                 this.ghostController.updateFromPointerHandler();
             }