diff --git a/src/main/java/org/gcube/portlets/user/td/csvimportwidget/client/CSVTableDetailCard.java b/src/main/java/org/gcube/portlets/user/td/csvimportwidget/client/CSVTableDetailCard.java
index 450edae..81f6ad6 100644
--- a/src/main/java/org/gcube/portlets/user/td/csvimportwidget/client/CSVTableDetailCard.java
+++ b/src/main/java/org/gcube/portlets/user/td/csvimportwidget/client/CSVTableDetailCard.java
@@ -321,8 +321,17 @@ public class CSVTableDetailCard extends WizardCard {
 			}
 			
 			if(vFrom!=null && vUntilTo!=null && vFrom.compareTo(vUntilTo)>0){
-				Log.debug("Attention Valid From field is higher than Valid Until To field");
-				UtilsGXT3.info("Attention", "Valid From field is higher than Valid Until To field");
+				Log.debug("Attention Valid From field is higher than Valid Until To field");				
+				AlertMessageBox d = new AlertMessageBox("Attention!", "Valid From field is higher than Valid Until To field");
+				d.addHideHandler(new HideHandler() {
+
+					public void onHide(HideEvent event) {
+						getWizardWindow().setEnableNextButton(true);
+						getWizardWindow().setEnableBackButton(false);
+
+					}
+				});
+				d.show();
 				return;
 			}