actvation number doesn't work

i enter the number and it will not activate???

Do you get any kind of message?

Hi Melvin,
I see that your license was never activated, are you copying the full key? If not, please try to input the full key as it is in the info message.

Also, please be aware that if you are using eM Client on Windows XP then eM Client cannot be activated as the security protocol of that OS have expired.

If neither of these tips help, copy the full error message.

yes i am still using XP iwish i had known it would not work with that OS