How to register Comodo i-Vault?

???Dear Sirs:

I have tryed to register Comodo i-Vault with various activation codes you have sent me, but they never work!!! Comodo i-Vault keeps sending me to the following URL:

http://i-vault.comodo.com/expires/28.html

Then, I place the new activation code, but an error message comes again and again (see the jpeg image attached).

Please send me a valid code.

Nadson Vinhas,
ESTUDIO CODEC
estudiocodec@bol.com.br
http://bahia.comuv.com/

I-Vault has been discontinued.