Not getting updates performed on "Shared" address book

[1oldfoxman]

Another user has shared and address book with me that contains a group definition she maintains. When she adds or deletes users to that group (her account) I don't get the updates in my version of the address book. Am I wrong in my expectation that this list she has shared should be automatically updated? It's the only shared book I use so my experience with this functionality is limited.

I have tried clicking on the File/Synchronize menu choice in the Address Book with the list highlighted and also by selecting the tab that represents her shared address book and File/Synch'ing as well.

Any help would be appreciated.
Dennis