I have a Giga3 DVD key which begins with 730C.

Tascam registration support tells me that that isn't actually my number, and gives me another number. I send them a scan of my DVD box, but they persist in saying that that's not a legit number. That's fine, since they gave me another number to try.

Unfortunately, the only characters which can be entered after "730" are: E,A,D,F,C, or B. Any other letter produces the error "Invalid Registration Key." ALll the numbers they've given me (as a courtesy) produce the invalid character message.

ANyone seen this?