unable to install software using ubuntu software centre

[Tobin Joseph]

Binary package hint: software-center

When I tried to install any of the packages from software center it shows following thing
1)Requires installation of untrusted packages
        The action would requires installation of packages from not authenticated sources
I cliked ok button but the software did'nt install. I tried to install again to install different software but same thing happened . The first software I tried to install was VLC media player. I am not sure if it is a bug or not.

ProblemType: Bug
DistroRelease: Ubuntu 10.10
Package: software-center 3.0.8
ProcVersionSignature: Ubuntu 2.6.35-28.49-generic 2.6.35.11
Uname: Linux 2.6.35-28-generic i686
NonfreeKernelModules: wl
Architecture: i386
Date: Sun Mar 13 10:25:08 2011
InstallationMedia: Ubuntu 10.10 "Maverick Meerkat" - Release i386 (20101007)
PackageArchitecture: all
ProcEnviron:
 LANGUAGE=en_IN:en
 PATH=(custom, user)
 LANG=en_IN
 LC_MESSAGES=en_IN.UTF-8
 SHELL=/bin/bash
SourcePackage: software-center

[Marc Deslauriers (mdeslaur)]

Thanks for taking the time to report this bug and helping to make Ubuntu better. We appreciate the difficulties you are facing, but this appears to be a "regular" (non-security) bug. I have unmarked it as a security issue since this bug does not show evidence of allowing attackers to cross privilege boundaries nor directly cause loss of data/privacy. Please feel free to report any other bugs you may find.

[IKT (ikt)]

Thank you for taking the time to report this bug and helping to make Ubuntu better. This particular bug has already been reported and is a duplicate of bug 705988, so it 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. Feel free to continue to report any other bugs you may find.