A simple solution for tracking changes to Access data…Error

I have searched this forum for some contact info on Susan Harkins who originally posted this download titled “A simple solution for tracking changes to Access data” Very nice and simple! I incorporated it into a DB for the first time recently and I am getting some strange error messages. I believe this is the only thing that could be causing them… Error “Operation is not supported by this type of object. 3251……….Can anyone clue me in as to why I am getting the error message?
Thanks