it's really not a good idea to insert and update on the same page.
for an update page, you need to pass a querystring variable that contains the ID of the record to update, for example:
update.php?id=22
you use this id query string variable in a recordset to look up the record in the database, then use the record binding as the initial value in the HTML Editor instance.
when the update form is submitted, it needs to pass that ID variable again, to tell the update behavior which record to update.