Calendar doesn't work with PostgreSQL

[anonymous]

Now when I add new event I see this error:

2007-05-12 21:06:18,108 Trac[main] ERROR: global name 'sqlite' is not defined
Traceback (most recent call last):
  File "K:\DevEnvironment\Python\Lib\site-packages\trac\web\main.py", line 387, in dispatch_request
    dispatcher.dispatch(req)
  File "K:\DevEnvironment\Python\Lib\site-packages\trac\web\main.py", line 237, in dispatch
    resp = chosen_handler.process_request(req)
  File "build\bdist.win32\egg\azcalendar\azcalendar.py", line 313, in process_request
  File "build\bdist.win32\egg\azcalendar\azcalendar.py", line 63, in process_add
  File "build\bdist.win32\egg\azcalendar\event.py", line 160, in save
NameError: global name 'sqlite' is not defined

It would be great if we could use calendar with PostgreSQL also