diff --git a/src/main/java/org/gcube/portlets/user/workspace/client/AppControllerExplorer.java b/src/main/java/org/gcube/portlets/user/workspace/client/AppControllerExplorer.java
index c9b3bf4..2b8f33f 100644
--- a/src/main/java/org/gcube/portlets/user/workspace/client/AppControllerExplorer.java
+++ b/src/main/java/org/gcube/portlets/user/workspace/client/AppControllerExplorer.java
@@ -1839,10 +1839,12 @@ public class AppControllerExplorer implements EventHandler, TreeAppControllerInt
 		
 		this.selectRootItem=selectRootItem;
 		
-		if(instancingMessages)
-			PollingWorkspace.pollReceivedMessages(-1, 20000); //the parameter -1 force (first) synchronization with HL
 		
-		PollingWorkspace.pollBulkCreator(15000);
+//		if(instancingMessages)
+//			PollingWorkspace.pollReceivedMessages(-1, 20000); //the parameter -1 force (first) synchronization with HL
+		
+		
+		PollingWorkspace.pollBulkCreator(ConstantsExplorer.TIME_BULK_CREATOR_POLLING);
 		
 		return this.explorerPanel;
 	}
diff --git a/src/main/java/org/gcube/portlets/user/workspace/client/ConstantsExplorer.java b/src/main/java/org/gcube/portlets/user/workspace/client/ConstantsExplorer.java
index b86f791..36e6569 100644
--- a/src/main/java/org/gcube/portlets/user/workspace/client/ConstantsExplorer.java
+++ b/src/main/java/org/gcube/portlets/user/workspace/client/ConstantsExplorer.java
@@ -20,6 +20,8 @@ public class ConstantsExplorer {
 	public static final String SERVER_ERROR = "Sorry, an error has occurred on the server when";
 	public static final String TRY_AGAIN = "Try again";
 	
+	public static final int TIME_BULK_CREATOR_POLLING = 300*1000; //in milliseconds
+	
 	//MESSAGE DIALOG BOX constants
 	public static final String MESSAGE_CONFIRM_DELETE_ITEM = "Are you sure you want to delete item";
 	public static final String MESSAGE_CONFIRM_DELETE_SMART_FOLDER = "Are you sure you want to delete smart folder";