EFI live Help
Otherwise, check the following when entering your registration for V6:
1. V6 serial numbers are *always* 12 digits long (V5 serial numbers are 16 digits, the serial number printed on the interface sticker is 8 digits), add or remove zeros from the left of the serial number to make it 12 digits for EFILive V6.
2. The key must contain 4 sets of 4 uppercase letters (no digits) and must include the hyphen "-" characters between each group of 4 character.
If you believe you have a V5 license key, you can have it upgraded (free) to a V6 license here: http://www.efilive.com/upgrade.html
Regards
Paul
P.S. If you're still having trouble, send an email to support@efilive.com - I'll look out for it.
I had the same problem.

