crash when I install ubuntu with flash disk

[Raden Arum Setia Priadi]

My flash disk is ScanDisk.

ProblemType: Bug
DistroRelease: Ubuntu 11.10
Package: ubiquity 2.8.7
ProcVersionSignature: Ubuntu 3.0.0-12.20-generic 3.0.4
Uname: Linux 3.0.0-12-generic i686
ApportVersion: 1.23-0ubuntu3
Architecture: i386
CasperVersion: 1.287
Date: Wed Nov 23 18:36:38 2011
LiveMediaBuild: Ubuntu 11.10 "Oneiric Ocelot" - Release i386 (20111012)
ProcEnviron:
 LANGUAGE=
 PATH=(custom, no user)
 LANG=en_US.UTF-8
SourcePackage: ubiquity
UpgradeStatus: No upgrade log present (probably fresh install)

[Ubuntu Foundations Team Bug Bot (crichton)]

Exception during installation:
Nov 23 18:36:09 ubuntu plugininstall.py: Traceback (most recent call last):
Nov 23 18:36:09 ubuntu plugininstall.py: File "/usr/share/ubiquity/plugininstall.py", line 1641, in <module>
Nov 23 18:36:09 ubuntu plugininstall.py: install.run()
Nov 23 18:36:09 ubuntu plugininstall.py: File "/usr/share/ubiquity/plugininstall.py", line 55, in wrapper
Nov 23 18:36:09 ubuntu plugininstall.py: func(self)
Nov 23 18:36:09 ubuntu plugininstall.py: File "/usr/share/ubiquity/plugininstall.py", line 160, in run
Nov 23 18:36:09 ubuntu plugininstall.py: self.configure_plugins()
Nov 23 18:36:09 ubuntu plugininstall.py: File "/usr/share/ubiquity/plugininstall.py", line 499, in configure_plugins
Nov 23 18:36:09 ubuntu plugininstall.py: raise install_misc.InstallStepError("Plugin %s failed with code %s" % (plugin.NAME, ret))
Nov 23 18:36:09 ubuntu plugininstall.py: InstallStepError: Plugin usersetup failed with code 1
Nov 23 18:36:09 ubuntu plugininstall.py:

[dino99 (9d9)]

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