Error in sys-confg-printer command in ubuntu

[jeetu]

HI TO ALL
when i try to enter command called sys-conf-printer i face this issue.
i will genuinely appreciate if u suggest somthin
this is the output
/usr/lib/pymodules/python2.6/gtk-2.0/gtk/__init__.py:57: GtkWarning:
could not open display
warnings.warn(str(e), _gtk.Warning)
libnotify-Message: Unable to get session bus: /bin/dbus-launch
terminated abnormally with the following error: Autolaunch error: X11
initialization failed.

/usr/share/system-config-printer/system-config-printer.py:136:
GtkWarning: gdk_cursor_new_for_display: assertion `GDK_IS_DISPLAY
(display)' failed
busy_cursor = gtk.gdk.Cursor(gtk.gdk.WATCH)
Traceback (most recent call last):
File "/usr/share/system-config-printer/system-config-printer.py",
line 136, in <module>
busy_cursor = gtk.gdk.Cursor(gtk.gdk.WATCH)
RuntimeError: could not create GdkCursor object
root@jeetendra-desktop:~#

RESPONSES ARE HIGHLY APPRECIATED