You used the RPM package which is offered directly from Adobe?
Please use the one from the non-free repository, you need to enable that first, for that got to
Mageia Control Center → Software Management → “Configure media sources for install and update”
and check that non-free_release and non-free_updates are enabled (the checkboxes in the first column)
After you know they are enabled, just install flash-player-plugin.
If you're using Google Chrome directly from Google, then you need to copy the plugin in chrome's plugin folder.
But i'd advise you to use chromium-browser packages from the software sources, so you get automatic updates
and have less problems with such plugins
