Kaspersky Internet Security 2013 shows activation error

Hi,
I just downloaded Kaspersky Antivirus in my Mac Operating System but when I try to install this software the activation error displays. I can’t continue my installation using the activation code. Can you provide me the key to install this software properly? I will be thankful to you.

Activation of Kaspersky Internet Security 2013.
Activation Error
Activation code is not suitable for this application.
