More specifically, when you load an Ultrabeat setting using the Import button in the upper portion of the Ultrabeat interface, you get an open dialog that points to the factory plug-in settings in the local domain:
/Library/Application Support/Logic/Plug-In Settings/Ultrabeat/
After you choose a setting, the drum kit fails to load, and the list for importing the drum sounds does not appear in the Ultrabeat user interface.
Resolve the issue by updating to Logic Pro 7.0.1 or later.