rhn_register returns the error "There was an error while reading the hardware info from the bios"

Issue

• Whenever  registering a machine, gets the following message in /var/log/up2date:

  [Mon Aug  9 11:34:21 2010] rhn_register There was an error while reading the hardware info from the bios. Traceback:
  [Mon Aug  9 11:34:21 2010] rhn_register 
  Traceback (most recent call last):
    File "/usr/share/rhn/up2date_client/tui.py", line 1510, in _activate_hardware
      hardwareInfo = hardware.get_hal_system_and_smbios()
    File "/usr/share/rhn/up2date_client/hardware.py", line 861, in get_hal_system_and_smbios
      computer = get_hal_computer()
    File "/usr/share/rhn/up2date_client/hardware.py", line 760, in get_hal_computer
      bus = dbus.SystemBus()
    File "/usr/lib/python2.4/site-packages/dbus/_dbus.py", line 260, in __new__
      return Bus.__new__(cls, Bus.TYPE_SYSTEM, use_default_mainloop, private)
    File "/usr/lib/python2.4/site-packages/dbus/_dbus.py", line 99, in __new__
      bus._connection = dbus_bindings.bus_get(bus_type, private)
    File "dbus_bindings.pyx", line 1692, in dbus_bindings.bus_get
  dbus_bindings.DBusException: Failed to connect to socket /var/run/dbus/system_bus_socket: No existe el fichero o el directorio
  [Mon Aug  9 11:34:21 2010] rhn_register 
  Traceback (most recent call last):
    File "/usr/sbin/rhn_register", line 82, in ?
      app.run()
    File "/usr/share/rhn/up2date_client/rhncli.py", line 65, in run
      sys.exit(self.main() or 0)
    File "/usr/sbin/rhn_register", line 64, in main
      ui.main()
    File "/usr/share/rhn/up2date_client/tui.py", line 1721, in main
      tui.run()
    File "/usr/share/rhn/up2date_client/tui.py", line 1608, in run
      if self._show_subscription_window() == False:
    File "/usr/share/rhn/up2date_client/tui.py", line 1562, in _show_subscription_window
      self.password)
    File "/usr/share/rhn/up2date_client/rhnreg.py", line 583, in getRemainingSubscriptions
      smbios = hardware.get_hal_smbios()
    File "/usr/share/rhn/up2date_client/hardware.py", line 874, in get_hal_smbios
      computer = get_hal_computer()
    File "/usr/share/rhn/up2date_client/hardware.py", line 760, in get_hal_computer
      bus = dbus.SystemBus()
    File "/usr/lib/python2.4/site-packages/dbus/_dbus.py", line 260, in __new__
      return Bus.__new__(cls, Bus.TYPE_SYSTEM, use_default_mainloop, private)
    File "/usr/lib/python2.4/site-packages/dbus/_dbus.py", line 99, in __new__
      bus._connection = dbus_bindings.bus_get(bus_type, private)
    File "dbus_bindings.pyx", line 1692, in dbus_bindings.bus_get
  dbus_bindings.DBusException: Failed to connect to socket /var/run/dbus/system_bus_socket: No existe el fichero o el directorio