M-Audio Drum & Bass Rig with GB, I give up!!

I got the full version of M-Audio's Drum & Bass rig when I bought my Axom25 last month, but I can NOT get it to work with Garageband. I was under the impression that since it offers AU, VST, and Stand Alone installations, I could simply choose tha AU option, restart Garageband (the install *says* it installs successfully), and then choose the new instruments/kits from the Generator, but I see nothing new at all, and nothing labeled "M-Audio" or anything like that shows up at the pull-down menu at the top of the Generator page......Any tips/advice/suggestions???? This is driving me NUTZ. Thanks.