[CentOS] PackageKit via ssh

Hi,

I'm trying to use gnome PackageKit (gpk-application) on a centos 6 
x86_64 system.
When I am sitting at the machine it works ok, but most of the time I am 
accessing that C6 system via ssh from my centos 5 desktop. In this 
scenario gpk-application starts ok, lists packages, resolves deps, 
etc... but then it doesn't pop up the box asking for the root password, 
and aborts with a message "Failed to obtain authentication".
I know I can use yum, but occasionally I like using a GUI to browse 
through available packages.

Is there any way to use PackageKit remotely via ssh?

Thanks