On the registration page, the code was origianly created for a standardd submit button.
you2 have changed the submit button to an image element type.
due to this change, the insert behavior can no longer trigger.
the trigger code for a standard submit button will look like this:
if ((isset($_POST["Registration_submit"]) && $_POST["Registration_submit"] != "")) // Trigger
but an image element type does not pass a value.
so the trigger code is slightly different:
if ((isset($_POST["Registration_submit_x"]) && $_POST["Registration_submit_x"] != "")) // Trigger
if you change the button type from submit to image, you also need to edit the insert records server behavior to reset the trigger.