Inheritence is getting put in place. Sorry it doesn't work on the current version.
If you've undone that and have nothing unusual, I'm quite confused as to why this would happen. Would you be able to mail me the test file(s) source Even if you strip the bodies of the methods out - it would be fine.
If this is something you can comfortably do, mail it to JRohde@ Microsoft.com.
If you don't want to do this, if you could at least post me something resembling the actual structure