When there's no CallbackName argument to a callback call,
what do I name my callback file?
That is:
$m->callback ... CallbackName => "BeforeDisplay" ...
The callback file is "BeforeDisplay"
What about:
$m->callback( TicketObj => $TicketObj, CustomFields =>
$CustomFields, ARGSRef => \%ARGS );
in the file Modify.html ?