event listener not getting any events..

[Torgeir Veimo]

I'm registering an event listener like this:

systemSession.getWorkspace().getObservationManager().addEventListener(new 
ProtectedNodeListener(systemSession),
  (Event.NODE_ADDED | Event.NODE_REMOVED | Event.PROPERTY_ADDED | 
Event.PROPERTY_REMOVED | Event.PROPERTY_CHANGED),
  "/jcr:root",
  true,
  null,
  new String [] { "nen:protected", "nen:ace" },
  true);
But I'm not getting any events when i create nodes with mixin nodetype 
nen:protected. Any clues on what I'm doing wrong?

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-Torgeir