player crashes when I put an mp3 to play

[alma]

Binary package hint: kaffeine

it's been reported an application problem :

"sorry, the program INSTALL-CODECS closed unexpectedly"

ProblemType: Crash
Architecture: i386
Date: Fri Jun 6 19:52:44 2008
DistroRelease: Ubuntu 8.04
ExecutablePath: /usr/lib/kaffeine/install-codecs
InterpreterPath: /usr/bin/python2.5
Package: kaffeine 0.8.6-0ubuntu8
PackageArchitecture: i386
ProcCmdline: /usr/bin/python /usr/lib/kaffeine/install-codecs ffmpeg
ProcEnviron:
 PATH=/usr/local/sbin:/usr/local/bin:/usr/sbin:/usr/bin:/sbin:/bin:/usr/games
 LANG=en_US.UTF-8
 SHELL=/bin/bash
PythonArgs: ['/usr/lib/kaffeine/install-codecs', 'ffmpeg']
SourcePackage: kaffeine
Title: install-codecs crashed with ImportError in <module>()
Traceback:
 Traceback (most recent call last):
   File "/usr/lib/kaffeine/install-codecs", line 5, in <module>
     from PyQt4.QtCore import *
 ImportError: No module named PyQt4.QtCore
Uname: Linux 2.6.24-16-generic i686
UserGroups: adm admin audio cdrom dialout dip floppy lpadmin netdev plugdev powerdev scanner video