First, you shouldn't use the CD, because it's a very old installer that will likely not run on recent OS. The only thing you should keep of your CD, it's the Serial Number.
Use only the installer on our Cloud9 page:
http://www.fsdreamteam.com/products_cloud9.htmlAnd, as explained on that page, with an "IMPORTANT" note:
IMPORTANT
If the Cloud9 product you purchased doesn't have an FSDT updated installer yet, you have to install the Cloud9 product first, then update the Stand-alone Addon Manager
This will allow you to use the "Register Serial" option for Cloud9 products AND will use the 6 activations per order, like FSDT ones.
After everything's updated, use the "Register Serial" option to activate and, if you are still getting the message about too many activations, contact our support via email, providing with your Serial Number, so we can add additional activations to it.