twisted - 1045 access denied for user 'root'@'localhost'

I have came across of following error appeared in poker-network-server.log:

Traceback (most recent call last):
2012-06-16 09:04:34+0100 [-] File "/usr/bin/twistd", line 14, in <module>
2012-06-16 09:04:34+0100 [-] run()
2012-06-16 09:04:34+0100 [-] File "/usr/lib/python2.7/dist-packages/twisted/scripts/twistd.py", line 27, in run
2012-06-16 09:04:34+0100 [-] app.run(runApp, ServerOptions)
2012-06-16 09:04:34+0100 [-] File "/usr/lib/python2.7/dist-packages/twisted/application/app.py", line 652, in run
2012-06-16 09:04:34+0100 [-] runApp(config)
2012-06-16 09:04:34+0100 [-] File "/usr/lib/python2.7/dist-packages/twisted/scripts/twistd.py", line 23, in runApp
2012-06-16 09:04:34+0100 [-] _SomeApplicationRunner(config).run()
2012-06-16 09:04:34+0100 [-] File "/usr/lib/python2.7/dist-packages/twisted/application/app.py", line 390, in run
2012-06-16 09:04:34+0100 [-] self.postApplication()
2012-06-16 09:04:34+0100 [-] File "/usr/lib/python2.7/dist-packages/twisted/scripts/_twistd_unix.py", line 208, in postApplication
2012-06-16 09:04:34+0100 [-] self.startApplication(self.application)
2012-06-16 09:04:34+0100 [-] File "/usr/lib/python2.7/dist-packages/twisted/scripts/_twistd_unix.py", line 326, in startApplication
2012-06-16 09:04:34+0100 [-] app.startApplication(application, not self.config['no_save'])
2012-06-16 09:04:34+0100 [-] File "/usr/lib/python2.7/dist-packages/twisted/application/app.py", line 674, in startApplication
2012-06-16 09:04:34+0100 [-] service.IService(application).startService()
2012-06-16 09:04:34+0100 [-] File "/usr/lib/python2.7/dist-packages/twisted/application/service.py", line 282, in startService
2012-06-16 09:04:34+0100 [-] service.startService()
2012-06-16 09:04:34+0100 [-] File "/usr/lib/python2.7/dist-packages/twisted/application/service.py", line 282, in startService
2012-06-16 09:04:34+0100 [-] service.startService()
2012-06-16 09:04:34+0100 [-] File "/usr/lib/python2.7/dist-packages/pokernetwork/pokerservice.py", line 229, in startService
2012-06-16 09:04:34+0100 [-] self.db = PokerDatabase(self.settings)
2012-06-16 09:04:34+0100 [-] File "/usr/lib/python2.7/dist-packages/pokernetwork/pokerdatabase.py", line 62, in __init__
2012-06-16 09:04:34+0100 [-] passwd = self.parameters["root_password"]
2012-06-16 09:04:34+0100 [-] File "/usr/lib/python2.7/dist-packages/MySQLdb/__init__.py", line 81, in Connect
2012-06-16 09:04:34+0100 [-] return Connection(*args, **kwargs)
2012-06-16 09:04:34+0100 [-] File "/usr/lib/python2.7/dist-packages/MySQLdb/connections.py", line 187, in __init__
2012-06-16 09:04:34+0100 [-] super(Connection, self).__init__(*args, **kwargs2)
2012-06-16 09:04:34+0100 [-] _mysql_exceptions.OperationalError: (1045, "Access denied for user 'root'@'localhost' (using password: NO)")

lsb_release -rd
Description: Ubuntu 12.04 LTS
Release: 12.04

apt-cache policy python-poker-network
python-poker-network:
  Installed: 1.7.7-3.2ubuntu2
  Candidate: 1.7.7-3.2ubuntu2
  Version table:
 *** 1.7.7-3.2ubuntu2 0
        500 http://archive.ubuntu.com/ubuntu/ precise/universe amd64 Packages
        100 /var/lib/dpkg/status

expected: properly installed and work
happened: Access denied for user 'root'@'localhost' (using password: NO)
(in my case it should be YES and somewhere defined proper conncetion to database.)
(probably causing twistd crash)

regards,
M.