WPMU dashboard install

Hi,
I uploaded the dashboard plugin into the plugins file, it doesn't show up among the plugings or in the site back end /site dashboard.
instead, I get this notification :
"Please install the latest version of our free Update Notifications plugin which helps you stay up-to-date with the most stable, secure versions of WPMU DEV themes and plugins. More information »"
I'll appreciate your help.
Thanks