For fun, just entered my S/N - no such animal on record. I then typed in the information, and it rejected the form based on my date of purchase not being in the dd/mm/yyyy format - which it was....I tried 3 times, then gave up.
Interesting webform function!
I just traded in my VP150 and the date format was dd-mm-yyyy - (hyphens, not forward slashes) and it took it no problem - after I entered it wrong several times as well - apparently there aren't 17 months in the year Who knew?