(8 replies, posted in AlphaTrack:User Forum)

I had the same problem - just installed Logic 9 and the Alphatrack didn't want to know. I followed 66d35's suggestion of deleting and then adding, but still nothing.

Here's what I did to solve the issue: in Applications I right clicked on both Logic 8 and Logic 9 and then clicked on 'Show Package Contents', then on 'Contents' and then on 'MIDI Device Plug-ins'. In Logic 8 I could see the 'AlphaTrack.bundle' but it was missing in Logic 9, so I copied it across from L8 to L9. As soon as I re-launched Logic 9, the Alphatrack sprang into life.

Hope this works for anyone else who's having problems.