ubiquity crashed with InstallStepError in configure_bootloader()

[sachin10190]

Binary package hint: ubiquity

i installed windows then ubuntu....but xp crashed thn deleted ubuntu partition from xp setup cd n reinstalled xp........but xp again crashed

ProblemType: Crash
Architecture: i386
DistroRelease: Ubuntu 8.10
ExecutablePath: /usr/lib/ubiquity/bin/ubiquity
InterpreterPath: /usr/bin/python2.5
NonfreeKernelModules: wl
Package: ubiquity 1.10.10
ProcAttrCurrent: unconfined
ProcCmdline: /usr/bin/python /usr/lib/ubiquity/bin/ubiquity --only
ProcEnviron:
 LANGUAGE=
 PATH=/sbin:/bin:/usr/sbin:/usr/bin
 LANG=en_US.UTF-8
PythonArgs: ['/usr/lib/ubiquity/bin/ubiquity', '--only']
SourcePackage: ubiquity
Title: ubiquity crashed with InstallStepError in configure_bootloader()
Uname: Linux 2.6.27-7-generic i686
UserGroups: