ubiquity-dm crashed with XStartupError in run()

[Angel Guzman Maeso]

Binary package hint: ubiquity

Just trying install Ubuntu. This crash appear.

ProblemType: Crash
Architecture: i386
DistroRelease: Ubuntu 9.04
ExecutablePath: /usr/bin/ubiquity-dm
InterpreterPath: /usr/bin/python2.6
MediaBuild: Ubuntu 9.04 "Jaunty Jackalope" - Release i386 (20090420.1)
Package: ubiquity 1.12.12
ProcAttrCurrent: unconfined
ProcCmdline: /usr/bin/python /usr/bin/ubiquity-dm vt7 :0 /usr/bin/ubiquity --only
ProcEnviron:
 LANGUAGE=
 PATH=(custom, no user)
 LANG=es_ES.UTF-8
PythonArgs: ['/usr/bin/ubiquity-dm', 'vt7', ':0', '/usr/bin/ubiquity', '--only']
SourcePackage: ubiquity
Title: ubiquity-dm crashed with XStartupError in run()
Uname: Linux 2.6.28-11-generic i686
UserGroups:

[Apport retracing service (apport)]

Thank you for taking the time to report this crash and helping to make Ubuntu better. This particular crash has already been reported and is a duplicate of bug #398614, so is being marked as such. Please look at the other bug report to see if there is any missing information that you can provide, or to see if there is a workaround for the bug. Additionally, any further discussion regarding the bug should occur in the other report. Please continue to report any other bugs you may find.

[Angel Guzman Maeso (shakaran)]

I can't follow the status of bug, the original bug says:
"Sorry, you don't have permission to access this page."

Could someone give permissions? Thanks