How could I control a DBus timeout with PolicyKit?

[Mario]

Hi! I have an application that uses PolicyKit.
If I do nothing (no password, no close window, no cancel button), I
get a DBus timeout.
I try to control it into my service with a "try:", but not works :(
Any idea, please?
Thanks in advance!

My code:
        ...........
        try:
            (is_auth, _, details) = self.polkit.CheckAuthorization(
                    ('unix-process', {'pid': dbus.UInt32(pid, variant_level=1),
                    'start-time': dbus.UInt64(0, variant_level=1)}),
                    privilege, {'': ''}, dbus.UInt32(1), '', timeout=600)
        except:
            raise       # <----- This not get the timeout exception.
        ............


The exception:
user at ubuntu:~/Desktop$ python 1.py
Traceback (most recent call last):
  File "1.py", line 5, in <module>
    print(iface.fw_unblock())
  File "/usr/lib/pymodules/python2.6/dbus/proxies.py", line 68, in __call__
    return self._proxy_method(*args, **keywords)
  File "/usr/lib/pymodules/python2.6/dbus/proxies.py", line 140, in __call__
    **keywords)
  File "/usr/lib/pymodules/python2.6/dbus/connection.py", line 620, in
call_blocking
    message, timeout)
dbus.exceptions.DBusException: org.freedesktop.DBus.Error.NoReply: Did
not receive a reply. Possible causes include: the remote application
did not send a reply, the message bus security policy blocked the
reply, the reply timeout expired, or the network connection was
broken.
user at ubuntu:~/Desktop$ python 1.py