Okay, I'll logon to the ticket to deal with the submit problem.
After successfully dealing with the pin issue in the last few tag on this thread, I decided to add a pin field the registration form - the purpose is to limit people who can register (they must know the pin).
When a user enters the pin, it validates against a recordset containing the pin using the 'like entry' behaviour. It's works in the last example you sorted for me (see previous tags on this thread) - but it doesn't work here - I get the attached errors in the browser - see attached screenshot.
I've also supplied the zipped page.