diff --git a/src/org/gcube/vremanagement/vremodeler/impl/ModelerService.java b/src/org/gcube/vremanagement/vremodeler/impl/ModelerService.java
index b9f6d93..8b43dac 100644
--- a/src/org/gcube/vremanagement/vremodeler/impl/ModelerService.java
+++ b/src/org/gcube/vremanagement/vremodeler/impl/ModelerService.java
@@ -227,11 +227,15 @@ public class ModelerService {
 
 			ArrayList<List<String>> values= new ArrayList<List<String>>(request.getCollectionElement().length);
 			ArrayList<String> row=null;
+			
+			logger.trace("the collection set for"+ dlKey+" are "+request.getCollectionElement().length);
+			
 			for (int i=0; i<request.getCollectionElement().length; i++)
 			{
 				row = new ArrayList<String>(2);
 				row.add(dlKey);
 				row.add(request.getCollectionElement()[i]);
+				values.add(row);
 			}
 			DBInterface.connect();
 			DBInterface.InsertInto("VRERELATEDCOLLECTION", values);