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 9a9b212..bf85f10 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
@@ -2123,9 +2123,9 @@ public class AppControllerExplorer implements EventHandler, TreeAppControllerInt
 				final List<org.gcube.portlets.widgets.workspacesharingwidget.shared.InfoContactModel> targets = multiDragContact.getTargetContactsWithMyLogin();
 				
 				if(targets.size()==1){
-					MessageBox info = MessageBox.info("Any Administrator/s?", "You have not selected any Administrator, confirm only you as Administrator and exit?", null);
+					MessageBoxConfirm info = new MessageBoxConfirm("Any Administrator/s?", "You have not selected any Administrator, confirm only you as Administrator and exit?");
 					
-					info.addCallback(new Listener<MessageBoxEvent>() {
+					info.getMessageBoxConfirm().addCallback(new Listener<MessageBoxEvent>() {
 
 						public void handleEvent(MessageBoxEvent be) {
 							//IF NOT CANCELLED
@@ -2138,8 +2138,6 @@ public class AppControllerExplorer implements EventHandler, TreeAppControllerInt
 							}
 						}
 					});
-					
-					info.show();
 				}
 				
 				if(targets.size()>1){