EXS 24 Logic Sampler Users Group

I've installed EXSP24 on my G4-533/OS9.2.2 to use with Digital
Performer 3.11, and I can't get it to call up the Sampler
Instruments. It 'sees' them, i.e., I see the names of the
instruments, but there's no sample playback, only a sine wave. I
have the EXSP24 VST plug in the VST folder, I have the latest
OS9 VST shell and I let the installer put the samples in the same
folder that my VST folder is in.

Is there a trick?