DispatchWithEvents not working for SQLDMO.Backup

[Chandra]

Hi,

I tried the following:

from win32com.client import DispatchWithEvents class BackupEvent: .... def OnPercentComplete(self, sMessage, nPercent):
.... print sMessage, nPercent
oSqlBackup = DispatchWithEvents('SQLDMO.Backup', BackupEvent)

Traceback (most recent call last):
raise ValueError, "This COM object does not support events."
ValueError: This COM object does not support events.
SQLDMO.Backup is a COM object with EVENT, why the error "does not
support events"? I tried the demo of DispatchWithEvents using IExplorer
and it's working, so I think the installation is correct. Is there
anyone facing the same problem?

Thanks,
Chandra