Darbuka crashes ProTools when recording

[wdogmx]

Advice needed. I'm using (or trying to use) Darbuka as an RTAS plugin in ProTools. It comes up okay and seems to synchronize fine with the PT's midi implementation - sees the PT host tempo, triggers when asked, audio comes into PT fine, etc. But while I can record midi information in a PT track, the minute I try to record the Darbuka audio, PT crashes followed by that very ugly Mac crash where you see a dark veil drop over the desktop with the ominous message, "You need to restart your computer..." Any ideas?

Specs:

Mac G4 Quicksilver, 993 Mhz, 1.25 GB RAM
OSX 10.3.9

ProTools HD2, version 6.2.3

Emagic MT4 midi interface, Apple Midi Setup utility latest version.

The session in question is a simple one. A dozen or so other midi tracks (mostly muted), a dozen 16 bit/44.1 audio tracks playing off a reliable firewire drive.

Also, Reason Adapted (another PT sound-producing plugin) works just fine.

[wdogmx]

solution found, courtesy of Lars...installing the RTAS version of the Darbuka plugin ALSO requires installing the AU update (available on the Wizoo website) when using Core Audio in OS X (not just with Logic as suggested by the documentation)...