[libvirt-users] event-test.py cannot detects domain shutdown

Hi,  I used event-test.py from here: http://libvirt.org/git/?p=libvirt-python.git;a=blob;f=examples/event-test.py... which is very lasted version. However, it detects all of events but not domain shutdown. I've searched through Google and got nothing. libvirtd version is 1.1.4 and using Xen for hypervisor.  Any ideas?  Larry