keneso - 8:37 pm on Sep 30, 2012 (gmt 0)

I tried your suggestion, and here's what happens:

I filled-in the fields but the "I accept the terms", and indeed comes out the alert message, and an error message right under the text field saying "this field is required", then I typed "i accept the terms" (please note lowercase), and alert message comes out again; finally I typed "I accept the terms" (this time capital I), and I get under the text field the following message:
"Please enter a value with a valid extension."

Yhank you.