I have tried to apply this to my own database, and even created a new form, with a field account with a combo called accountfilter, and also has a field called entry with a combo called entryfilter.  I even copied the code from the database I downloaded and pasted into my form, changed the After Update to =UpdateFilter(), and even though the combo boxes pulles the right info, I get an error "The expression  After Update you entered as the event property setting produced the following error: Type mismatch."