Just as a guess, I'd say something isn't right in the adsm/baclient
subdirectory.
I'd try reinstalling the old client into the adsm/baclient directory before
reinstalling the service.

If that doesn't work, I'd use regedt32 to hunt around and see if there are
any entries with "adsm" in them that have bad file pointers.

But again, I don't actually know, I'm just guessing......