--- a/samples/main-query-interface.cc	Sun Dec 30 19:36:44 2007 -0800
+++ b/samples/main-query-interface.cc	Wed Jan 02 09:09:24 2008 +0100
@@ -122,8 +122,6 @@
 AnImplementation::AnImplementation (void)
 {
   NS_LOG_FUNCTION;
-  // enable our interface
-  SetInterfaceId (AnImplementation::iid);
 }
 
 void
@@ -233,7 +231,7 @@
 
 AnExtendedImplementation::AnExtendedImplementation (void)
 {
-  pImpl = Create<AnImplementation> (); 
+  pImpl = CreateObject<AnImplementation> (); 
   SetInterfaceId (AnExtendedImplementation::iid);
 }