Failed to connnect to the session bus

Hi,

When I run evince on my ubuntu (10.04), I get the following error.
Would you please let me know how to trouble shout the cause fo the
warnings?

I don't find gconf-sanity-check-1 or gconf-sanity-check-2 on my
machine. What package in ubuntu I should install?

** (evince:12510): WARNING **: Failed to connect to the session bus:
/bin/dbus-launch terminated abnormally without any error message

** (evince:12510): WARNING **: Error connection to DBus:
/bin/dbus-launch terminated abnormally without any error message


** (evince:12510): WARNING **: Error connecting to D-Bus:
/bin/dbus-launch terminated abnormally without any error message
GConf Error: Failed to contact configuration server; some possible
causes are that you need to enable TCP/IP networking for ORBit, or you
have stale NFS locks due to a system crash. See
http://projects.gnome.org/gconf/ for information. (Details -  1:
Failed to get connection to session: /bin/dbus-launch terminated
abnormally without any error message)
GConf Error: Failed to contact configuration server; some possible
causes are that you need to enable TCP/IP networking for ORBit, or you
have stale NFS locks due to a system crash. See
http://projects.gnome.org/gconf/ for information. (Details -  1:
Failed to get connection to session: /bin/dbus-launch terminated
abnormally without any error message)
GConf Error: Failed to contact configuration server; some possible
causes are that you need to enable TCP/IP networking for ORBit, or you
have stale NFS locks due to a system crash. See
http://projects.gnome.org/gconf/ for information. (Details -  1:
Failed to get connection to session: /bin/dbus-launch terminated
abnormally without any error message)
GConf Error: Failed to contact configuration server; some possible
causes are that you need to enable TCP/IP networking for ORBit, or you
have stale NFS locks due to a system crash. See
http://projects.gnome.org/gconf/ for information. (Details -  1:
Failed to get connection to session: /bin/dbus-launch terminated
abnormally without any error message)
GConf Error: Failed to contact configuration server; some possible
causes are that you need to enable TCP/IP networking for ORBit, or you
have stale NFS locks due to a system crash. See
http://projects.gnome.org/gconf/ for information. (Details -  1:
Failed to get connection to session: /bin/dbus-launch terminated
abnormally without any error message)
GConf Error: Failed to contact configuration server; some possible
causes are that you need to enable TCP/IP networking for ORBit, or you
have stale NFS locks due to a system crash. See
http://projects.gnome.org/gconf/ for information. (Details -  1:
Failed to get connection to session: /bin/dbus-launch terminated
abnormally without any error message)


-- 
Regards,
Peng