Index: NetworkBase.cs
===================================================================
--- NetworkBase.cs	(revision 11943)
+++ NetworkBase.cs	(working copy)
@@ -1804,7 +1804,7 @@
 		private void SendNCreateNSetNDeleteHelper(DicomCommandField commandField, byte presentationId, ushort messageId, DicomMessage message, DicomStatus status)
 		{
 			message.CommandField = commandField;
-			message.MessageId = messageId;
+			message.MessageIdBeingRespondedTo = messageId;
 			message.AffectedSopClassUid = message.AffectedSopClassUid;
 			if (!message.CommandSet.Contains(DicomTags.Priority))
 				message.Priority = DicomPriority.Medium;