ga 3 and lion install problem

i have cubase 6 on my mac that has lion. i can install ga full install with my dvd content. then i can install the same version update. cubase doesnt recognize my ga 3 as a vst instrument. i also installed halion symp orch. cubase recognize this plugin. what can i do to use ga 3 inside cubase?

Steinberg obliged to give support to their product GA 3 in Cubase 6! Or return the money for a foul cakes with kittens!