printer-applet.py crashed with ImportError in <module>()

[aguy]

Binary package hint: kdeutils

just logged into computer then error occured

ProblemType: Crash
Architecture: i386
DistroRelease: Ubuntu 9.04
ExecutablePath: /usr/share/kde4/apps/printer-applet/printer-applet.py
InterpreterPath: /usr/bin/python2.6
NonfreeKernelModules: nvidia
Package: kde-printer-applet 4:4.2.1-0ubuntu1
ProcCmdline: python /usr/bin/printer-applet
ProcEnviron:
 PATH=(custom, user)
 LANG=en_GB.UTF-8
 SHELL=/bin/bash
PythonArgs: ['/usr/bin/printer-applet']
SourcePackage: kdeutils
Title: printer-applet.py crashed with ImportError in <module>()
Traceback:
 Traceback (most recent call last):
   File "/usr/bin/printer-applet", line 63, in <module>
     import dbus.mainloop.qt
 ImportError: No module named qt
Uname: Linux 2.6.28-11-generic i686
UserGroups: adm admin audio cdrom dialout dip floppy fuse lpadmin plugdev video