software-center crashed with ImportError in msg_reply_handler()

Binary package hint: software-center

I want to download avant from Center Software

ProblemType: Crash
Architecture: i386
Date: Mon Jan 18 18:29:39 2010
DistroRelease: Ubuntu 10.04
ExecutablePath: /usr/share/software-center/software-center
InstallationMedia: Ubuntu 10.04 "Lucid Lynx" - Alpha i386 (20100113)
InterpreterPath: /usr/bin/python2.6
Package: software-center 1.1.8
PackageArchitecture: all
ProcCmdline: /usr/bin/python /usr/bin/software-center
ProcEnviron:
 LANG=ru_UA.utf8
 SHELL=/bin/bash
ProcVersionSignature: Ubuntu 2.6.32-10.14-generic
PythonArgs: ['/usr/bin/software-center']
SourcePackage: software-center
Tags: lucid
Title: software-center crashed with ImportError in msg_reply_handler()
Traceback:
 Traceback (most recent call last):
   File "/usr/lib/pymodules/python2.6/dbus/connection.py", line 579, in msg_reply_handler
     *message.get_args_list()))
 ImportError: PyGI support not enabled
Uname: Linux 2.6.32-10-generic i686
UserGroups: adm admin cdrom dialout lpadmin plugdev sambashare