Wavestation Legacy error with MainStage 2.2.2
I'm using MainStage 2.2.2 on a Mac OS 10.7.5. When scanning the Korg Wavestation Legacy plugin I get this error:
VERIFYING RECOMMENDED PROPERTIES:
VERIFYING PROPERTY: Latency
PASS
ERROR: -2147450878 IN CALL Remove Property Listener
* * FAIL
--------------------------------------------------
AU VALIDATION FAILED: CORRECT THE ERRORS ABOVE.
I am using this plugin successfully with Mainstage 2.2.2 on a Mac with OS 10.6.8. The Korg Wavestation Legacy runs fine as a stand-alone. I am using Mainstage in 32 bit mode. It is essential for me to use this plugin with my next project. I appreciate any help and advice to solve this.
MacBook Pro, Mac OS X (10.7.5)